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Frequently-Asked Questions

Frequently Asked Questions (click for the answer):

How safe are ErosTek devices?

How do ErosTek devices differ from medical devices?

How much current do ErosTek products deliver?

What version of ErosLink software works with the ET-232?

Can I order direct from ErosTek?

Why do your products cost more than others?

Do your products have enough power for BDSM Play?

Just what is “Dynamic Pulse Technology”?

What all can I connect to the audio input?

What accessories can I use with ErosTek products?

We’re a dealer, what is your wholesale pricing?

Q: How safe are ErosTek devices?

A: Because medical e-stim devices such as TENS and EMS devices have a excellent track record for safety, we built upon the same technology used in medical devices and the research that has gone into making them safer. E-stim, however, isn’t without risks and there are some people who shouldn’t use any e-stim device. See our Safety page for more information.

Q: How do ErosTek devices differ from medical devices?

A: While our products use a similar basic waveform compared to many medical e-stim devices, they are NOT designed for treating any sort of medical condition and should not be used for such purposes.  Medical devices were not designed to be erotic, and our products were not designed to treat medical conditions.  Nearly everyone finds our products far more erotic than medical e-stim devices.

Q: How much current do ErosTek products deliver?

A: The simple answer is our products can deliver a lot more current than TENS units and most competing products. Very few of our customers use the full output of our products. The more detailed answer is medical devices use constant current output circuitry that allows for consistent medical e-stim (i.e. a doctor can prescribe 40 milliamps of TENS therapy for 30 minutes per day) that makes it easy to specify their current output. We found constant current e-stim doesn’t feel as good and it’s also not as safe for erotic use. For that reason, our products dynamically adjust their output current to best suit how they’re being used. That makes them feel better and automatically deliver more or less current as required. It also makes it much harder to specify the current output because it depends on how the device is used and how the measurement is performed.

Q: What version of ErosLink software works with the ET-301R or ET-232?

A: I new version of ErosLink for the ET-232 power unit is actively being developed.

Q: Can I order direct from ErosTek?

A: Sorta. SexTek (our brother company) is the factory-direct source for ErosTek units and high-quality e-stim accessories.

Q: Why do ErosTek products cost more than some other erotic units?

A: We simply put a lot more into our products. Our units typically do more than 2 or 3 other units combined.  They also typically cost several times as much to manufacture. Our ET-312B out the door weighs about 5 pounds. That’s a lot of hardware. Our profit margins are actually lower than most of our competitor’s.

Q: Are your products powerful enough for S&M use or are they mainly designed for pleasure?

A: We’re proud of the fact our products do both very nicely. Most users never come close to using the maximum power settings.  Yet our products can also be highly erotic.

Q: Just what is “Dynamic Pulse Technology”?

A: It’s a proprietary method of generating erotic waveforms in the digital domain.  The result is greatly increased variety and unique erotic sensations. You can read all the details in our Technology section.

E-Stim Safety

A Few Words on Safety

Electrostimulation is widely used for physical therapy and medical purposes. TENS units, for example, are often sent home with physical therapy patients for regular, and sometimes long term use. Our products use the same well proven bipolar waveform technology that’s used in medical devices such as most TENS and EMS units. Devices designed for erotic use have also been in use for over 15 years with few reports of serious problems.

E-stim, however, isn’t without risks and isn’t for everyone. E-stim devices are NOT for use by or on anyone with implanted electronic devices (i.e. pacemakers, defibrillators, drug pumps, etc.), heart problems, heart disease, epilepsy, brain disorders, nervous system disorders, a history of strokes or seizures, or similar medical conditions.  Pregnant women, women who might be pregnant or anyone under the age of 18 should also not use any e-stim device. If you have any doubts or questions, you should contact ErosTek and a qualified physician before using any e-stim products.

It’s important to keep the path of current away from the heart, neck and head areas. The general guideline is: “Keep it below the waist.” Our equipment is intended for use with electrodes and accessories designed for safe electrostimulation. Always follow the accessory manufacture’s instructions as well as those that come with our products. Body piercings, or other contacts with similarly small surface area, should not be connected to any electrostimulation equipment. Always read and follow all the safety information included with e-stim devices.

ErosTek products incorporate additional features not found in many competing products that enhance safety such as symmetrical bipolar waveforms and fully isolated outputs. We use fail safe measures in our circuitry to limit the output even if a component should fail. We also limit our waveform duty cycle to minimize the energy dissipated in the body. Our products incorporate an automatic self-test that checks critical circuits every time you turn them on. We take safety seriously but ultimately e-stim safety is in the hands of the user.

If you have any doubt about the risks associated with e-stim, consult a physician and SexTek Support before purchasing or using our products.

Guide to E-Stim

Creative minds found new uses for a 1950’s device called the Relaxacisor.


As the name implies, the Relaxacisor provided passive “exercise” by stimulating muscles with an electrical current. This later became more commonly known as EMS, or Electro Muscular Stimulation, and is still around today. It didn’t take long for creative people to figure out they could wire these units to more sensitive parts of the anatomy and stimulate more than just muscles. So at least since the 50’s people have been getting off while wired up. Most EMS devices, however, offer little variety in their stimulation.

The medical profession helped out in the late 1970’s with the introduction of TENS or Transcutaneous Electrical Nerve Stimulation.



TENS is widely used by physical therapists for pain management. Again, many people found alternate uses for their TENS units. Many offer more variety in their output than EMS devices, and are optimized to act on nerves rather than muscles, but they’re typically less powerful and are certainly not designed to be erotic. In fact, they’re designed to deaden sensation (such as back pain).

Made-for-play devices first became popular somewhere around the early 1980’s.



Most work on roughly the same principal as TENS and EMS devices but are marketed for erotic purposes. They usually allow adjustment of frequency and level, but most lack other options to add sufficient variety to the stimulation. Enthusiasts find most of them boring after a while, as the output doesn’t change unless you manually change the settings.

Erotic e-stim technology moved ahead in early 1999 when ErosTek entered the scene.


We developed digital Dynamic Pulse Technology and created an entirely new genre of devices. Imagine someone sitting at a piano playing the same single note over and over — that’s pretty much what our competitors products do. Now imagine sitting down and having a pianist play real music — that’s what our products do. See our Technology section for more details about what makes ErosTek different.

Beginners should start by checking out our Buyer’s Guide and Safety sections.

There’s also a link on our Resources page to an online forum specializing in erotic e-stim. If you’ve never experienced any of this, you might want to find someone who’s familiar with it to give you a demonstration. It’s not for everyone, but even those who suspect they won’t like it, often end up wishing they’d discovered it a long time ago.

Safety is Important!

You should only use devices specifically designed for the human body. You should also read all the instructions and safety information that comes with any electrostimulation product. Everyone should read our Safety section.


Why Electrostimulation?

Many people enjoy erotic e-stim simply because it makes them horny. Couples have discovered it’s the perfect enhancement to spice up their love life. Individuals find it takes masturbation to a whole new level with some even experiencing “hands free” orgasms. Still others use it for erotic BDSM play where it can create high-intensity sensations without causing the lingering discomfort and harm to the body you often get with other BDSM techniques.

Erotic e-stim is a great addition to many sexual scenarios. Our products can produce a continuously changing variety of erotic sensations. You could put a blindfold on your partner, and they’ll swear you’re working all sorts of magic. In reality, you’ll just be sitting back and watching ErosTek do all the work! There are endless possibilities–especially when you consider our exclusive microphone, audio, remote control and computer capabilities.

What Does it Feel like?

Interestingly, erotic electrostimulation feels very different from what most people imagine. With the right equipment, it can be extremely pleasurable and is sometimes described as feeling like an “internal vibrator.” When you supply the right electrical signals to the body’s nerves, the recipient can feel some amazingly erotic sensations. Mere words don’t really do it justice.

Why ErosTek?

We invented a new generation of digital e-stim products and continue to offer the most innovative products on the market. We invite you to check out the extensive information on this website and see if you don’t agree.

Want to Learn More?

Check out the links below for more information on our products and erotic electrostimulation in general. If you’re new to e-stim, our Getting Started Guide is a good place to start as it provides some history and background. If you’re shopping for e-stim products, check out the Buyer’s Guide to learn more about the products on the market. If you’re looking for independent information, check our Resources section. And before using any e-stim device everyone should read our Safety Information.

ErosTek Technology

The ErosTek Advantage!

Our advanced technology is the key to our products. We introduced the world’s first digital erotic e-stim product in early 1999. This section describes some of the technology that sets us apart. So if you’re curious about the science behind the magic, keep reading . . .

Dynamic Pulse Technology

We invented something called Dynamic Pulse Technology (DPT). It’s a unique method of generating erotic electrostimulation waveforms in the digital domain while all relevant parameters are dynamically adjusted in real-time. By comparison, most other units require you to manually set things like the pulse frequency, pulse width, intensity and on/off rate. Once set, these units put out the same monotonous waveform over and over.  With DPT, ErosTek creates a wide variety of sensations the others can’t come close to.

Imagine sitting down at a piano. With most products, you can pick what note you want, and how fast it’s played, but that’s all you get–one note played endlessly. DPT allows entire “songs” (stimulation routines) to be “played.” Our digital processor can change the notes on the fly, change how fast they’re played and even how “loud.” Our products can even produce the equivalent of a “chord” (several “notes” at once). Sensations can range from a light tickle to a deep down throb–all without touching the controls. With ErosLink, you can even download and/or write your own “songs”!

TriPhase Stimulation

Imagine having three electrodes–lets call them “A,” “B” and “C.” Now try to imagine what it might feel like (with creative electrode placement) if you could create a unique current flowing from A to B, a different current flowing from B to C and finally a third unique current from A to C? Now imagine the three currents artfully coordinated so the sensations flow and intermingle between the three areas of your body? That’s the magic of our TriPhase stimulation. If you try the above with any other e-stim product we’re aware of, you’ll only get, at most, two unique currents.

ErosLink Interface

We’ve invented a multipurpose interface that connects to a computer or can connect two ET-312 units together. This is a fully digital connection and allows new stimulation routines to be loaded into the ET-312. It also provides real-time control and adjustment of the unit over the link. This allows connecting two units together with one acting as a “master” and the other a “slave.” The master unit can coordinate the stimulation across all four channels so the two devices, in some ways, behave as a single 4 channel unit. The real-time control feature can even allow remote control of the ET-312 over the Internet (a future enhancement). Our exclusive Link interface opens up endless possibilities.

Balanced Symmetrical Bipolar Waveforms

Up until we came along, one key difference between medical grade electrostimulation equipment and the erotic units has been the waveforms. Most medical grade equipment, such as high quality TENS and EMS units, use a true symmetrical balanced bipolar waveform (sometimes called “biphasic”). This means the peak positive and negative currents are the same.  We agree with all those medical researchers and, even though it requires more costly circuitry, our units nearly stand alone among erotic models in using the same bipolar waveform technology.

Why is bipolar better? For one thing, it assures uniform sensations between two similar electrodes. With a nonsymmetrical waveform, you’ll often feel the current more in one electrode than the other–it feels “lopsided.” Many people think bipolar just plain feels better. There’s also evidence that symmetrical bipolar waveforms are safer as they may help prevent electrochemical reactions. Finally, bipolar allows higher intensity levels from a given peak current value reducing the amount of peak current needed.

Isolated & Independent Outputs

Nearly all e-stim units (erotic or otherwise) use a common waveform generator shared between multiple channels. At best, they can alternate the same output across multiple channels. Some are really just a single channel device with two or more output jacks (and perhaps multiple level controls).

Our multi-channel devices use completely independent circuitry and can do entirely different things on each channel. This greatly adds to the variety that can be produced. To use the piano analogy again, it’s a lot like having a pianist use two hands on the keyboard instead of only one. The left and right hand can do different things, but in a coordinated way. That’s similar to what our more advanced stimulation routines do.

We also fully isolate the outputs from each other and the rest of the circuitry. Why is this important? Many units share a common connection between their two outputs. This means you can easily end up with current flowing through unintended parts of the body.  In some cases, this isn’t only undesirable, it can be dangerous.

Our isolated outputs also provide an additional measure of safety, protecting you against a failure in the device itself or any connected equipment. If your stereo or computer is plugged into one of our products, even if it should fail, have a grounding problem, etc., the outputs are safely isolated so your body isn’t part of the circuit.  Likewise, there’s an additional layer of isolation between you and the power source.

Quality Design & Engineering

Our products, unlike most consumer electronics these days, are manufactured in the USA. Components are conservatively specified to assure maximum life and a minimum of failures. Critical circuitry is designed with fail-safe measures to enhance safety. Each unit is extensively tested before it’s shipped out and we back it all up with a solid warranty and customer service.

ErosTek Experience

When it comes to high end e-stim, ErosTek has more experience than anyone. We pioneered digital e-stim, audio based stimulation, remote control, Dynamic Pulse Technology, MultiAdjust, TriPhase and other revolutionary features and technology. We have listened carefully to our customers and learned a lot as our products have evolved.


What Our Customers Think

We’ve made some pretty strong claims for our products. If you’re skeptical, we encourage you to ask around and find someone who owns an ErosTek product. Chances are they’ll have very good things to say. Some sample comments:

Public forum comments:

  • I’m extremely satisfied with this unit, and I’d expect that when people figure out how much fun these are, you’ll have a hard time keeping up with demand.
  • I would say, without hesitation, that Erostek/Sextek offer products that are IN A CLASS OF THEIR OWN and their support of those products is equally unparalleled…
  • It’s the best sex toy I own, period (and I have quite a few). In fact, I almost feel bad, because I feel like most of my other sex toys will be sitting in a bin for a looong time now.
  • I stimmed for about an hour, totally immersed in the incredible sensations.
  • What can I say- its fantastic. I have turned lots of friends on to estimming with it. I have tried changing the internal settings but have always gone back to the default settings. It is clearly, a well thought out device.
  • The ET-312 has been a very fine performer, and I recommend it to all. The built-in programs are excellent,
  • I’ve had mine for a few months now, and love it. Everything already said is true and so much more. The ability to create your own routines with ErosLink is a HUGE plus.
  • It’s a great unit, no doubt about it. After a couple of months, I’ve found that my “favorites” keep changing. I guess that says a lot about the variety and their effectiveness.

Simply Amazing!

“I had played with your previous ET-212 and immediately wanted one.  I ended up getting the ET-312 and can only say it’s simply amazing! I’ve played with a lot of other electric toys including some of the newest ones on the market. I can honestly say none of them even come close to the ET-312. Great job ErosTek!” – Gary, Los Angeles

ET-312 Is A Big Hit

“The Waves mode on your new ET-312 is a big hit with everyone who’s experienced it.  It has been responsible for a few ‘hands off’ orgasms and even has someone who used to hate electricity begging for more.” – Jeff, Seattle

Even More Variety

“I love my ET-212 and it was hard to imagine wanting to buy something else. After trying the ET-312 at IML, I couldn’t resist. I’m really glad I bought one as it has even more variety than the ET-212 and the high frequency output is more erotic. I was worried it might be harder to use but if I can figure it out, anyone can.” – David, Chicago

Ultimate BDSM Toy

“In my opinion, your new ET-312 is the ultimate BDSM toy. It has more power than anything else I’ve used and the range of sensations is amazing. It can do anything from induce an orgasm to keep a sub guessing as to what’s coming next. I also use the microphone as an incentive to keep my subs quiet. I want another one!” – Professional Dominatrix, Los Angeles

Buyer’s Guide

Confusing Choices…

There are lots of e-stim options. You can choose from devices designed for medical use (like TENS and EMS units). There are also devices marketed direct to consumers for massage and “body toning.” Other people try to adapt devices never intended for human e-stim. Finally, there are units especially designed for erotic use. This section discusses the various options and things to consider.

TENS and EMS Medical Devices

TENS units have dropped in price making them a common choice for erotic e-stim. While they can be used for this purpose, most people don’t find them especially erotic. This is because they were designed to desensitize nerves (for pain management) rather than provide erotic stimulation. EMS units are designed to cause muscle contraction and are also far from optimal for erotic use. Both suffer from a limited number of modes and variety. Some of the newer, less expensive units being marketed direct to consumers also lack a proper bipolar waveform and do not have fully isolated outputs. You get what you pay for, and where your genitals are concerned, you might want to think twice about trying to save a few bucks?

Electro Massage/Body Toning Devices

An increasing number of e-stim devices are being marketed direct to consumers rather than to medical professionals. Most of these are “body toners” or “electro massage” type devices. They vary widely in quality and capabilities, but most suffer from a very low power output–often too low for erotic use. Many are also very cheaply made, lack bipolar waveforms and are missing important features.  And, like the medical devices, they were not designed to be erotic in the first place.

Homemade or Adapted Devices

Some people, usually in an effort to save money, try to build their own e-stim devices or adapt commercial products that were never intended for human e-stim–like animal training products, hand generators, transformers and audio equipment. These devices generally use high duty cycle waveforms, which is the opposite of what you want for e-stim. They can easily cause various kinds of damage to the body or even death. We know of several people who have suffered lasting harm from trying to use these devices for e-stim. Given all the serious safety issues, they’re simply not worth the many risks!  Always use devices designed for use on the human body even if they’re not ours. [Read more about stereo amplifier e-stim.]

Analog Erotic E-Stim Devices

A few manufactures have designed products specifically for erotic e-stim. Nearly all of these are based on a very simple analog design that dates back to the 80’s. The stimulation simply turns on and off at an adjustable rate. These products have few advantages over less expensive TENS units and, in some ways, are often inferior. Regardless, most people who buy them end up wanting more variety. Many also end up wanting more intensity although at least one model packs quite a punch.

Digital Erotic E-Stim Devices

We’re often asked “what’s so great about digital e-stim?” The answer is simple: Variety! Instead of a device that can only turn the output on and off over and over, a digital device opens up a whole new dimension. We like to compare it to playing the same note over and over on a piano versus playing real music. Which would you rather listen to?

By producing waveforms in the digital domain, and including a powerful microprocessor, our products can deliver vastly more complex stimulation. The output can be constantly changing and choreographed between multiple channels. It’s simply a night and day difference.

ErosTek pioneered the use of digital erotic e-stim in 1999. Since then, a few others have come and gone with digital products.  They say imitation is the sincerest form of flattery. If you’re interested in purchasing erotic e-stim equipment, you might want to consider the following points before you make your decision:

  • Ease Of Use:

    Ease of use is important. The lighted display on our ET-312 tells you what’s going on in plain English and our remote units have a lighted numeric display. Most of our products use simple controls to set the stimulation intensity which are easier to use than Up/Down buttons and make it easy to rapidly turn down the level if there’s a problem.  Finally, our exclusive MultiAdjust control makes fine tuning very easy. It automatically lets you adjust the best parameters for each mode.

  • Type of Waveform:

    Nearly all the competition is still using an asymmetrical waveform. While this makes their units cheaper to produce, it yields inferior "lopsided" stimulation and there's scientific evidence it may not be as safe. All ErosTek products use a medical grade fully symmetrical bipolar waveform.  It's a difference you can feel and offers additional peace of mind. See our Technology section if you're curious why symmetrical waveforms are important.

  • Maximum Power & Frequency:

    Small hand held units that run off a 9 volt battery are inherently limited in the types and intensity of output they can produce. While our small units use 9 volt power for portability, we’ve learned the very best waveforms for erotic e-stim require a bigger power supply. The battery powered ET-312 uses a large internal battery and the unit weighs nearly 3 pounds. It’s simply in a different league altogether.Even in our 9 volt powered units, we use exclusive Dynamic Pulse Technology to use the battery power as efficiently as possible.  Many customers say our 9 volt powered units simply “feel better” and also offer more intensity than the competition’s products. The ET-312 is the only unit we know of that provides the same output regardless of the battery’s charge level. With others, as the battery runs down, the maximum output power falls with it.

  • Number of Settings & Variety:

    Most competing units have only a few unique operating modes. Variety is the spice of life and it’s especially important for e-stim. Our remote-controlled ET302R gives you 10 unique modes, our ET232 gives you 15 modes,  and our ET312B gives you 18 or more (via optional ErosLink software).

  • Audio Input:

    Audio-based stimulation can be really fun but most units lack audio capabilities–something we introduced to the world in early 1999. If you haven’t tried audio-based e-stim, you don’t know what you’re missing! We’ve further refined our exclusive audio technology in the ET312B and the microphone is built-in on our other products.

  • An Eye Towards Safety:

    Not only do all our products use a medical-grade bipolar waveform, but they all have fully isolated outputs which helps prevent dangerous unintentional current paths in the body. Our products use current limited outputs and duty cycle management to limit maximum power levels. We also incorporate fail-safe circuitry that helps prevent dangerous output levels even if a critical internal component should fail during use. Finally, the microprocessor in our products performs a self test on every power up. If any problems are found, the unit displays an error code and shuts down instead of risking unsafe operation.

  • An Experienced Manufacturer:

    ErosTek has over 10 years of digital erotic e-stim experience. We've also learned a lot since we introduced our first model. We're already working on our fourth generation products. This is a very small niche market and some competitors have already come and gone. Will you be able to get your expensive unit repaired if the manufacturer is no longer in business?

  • Value:

    Our products contain more advanced technology and more features than any offered by our competition. Many of our customers own half a dozen e-stim power units and, after buying one of ours, never use anything else. Two of our products easily offer more variety than 3 or 4 other devices combined. We suggest you shop carefully and you might want to read what others think.

  • Not Sure What to Start With?

    Starting out with erotic e-stim can be challenging given the variety of power units and electrode accessories available. We have a few ideas to get you started:

    1. Check out our ready-to-go Package Deals featuring the ET312B and ET232 power units and an assortment of our most popular electrodes and accessories to get you off in the right direction.
    2. You can always contact us via our Support Page if you need help deciding what to buy or need help after your order arrives.

About ErosTek

Focused on E-Stim

ErosTek and SexTek are established brands (owned by the same company) providing the best erotic e-stim products available. ErosTek was the first to introduce digital erotic e-stim technology in early 1999. It has gone on to develop additional products and have become the world leader in erotic e-stim.

The Right Knowledge

We’re made up of individuals with extensive experience in both erotic e-stim and advanced hardware and software engineering. We don’t want to be the biggest player out there, but our mission is to offer the best stimulation units available anywhere at a reasonable price. Ask around, we think you’ll hear good things.

We Developed Our Own Niche

We’ve focused our efforts exclusively on developing high-end power units because that’s where we found the most room for improvement. E-stim starts with the power source and we’ve created an entirely new genre of products. There are several manufactures making excellent erotic accessories, but their stimulation units often lack sufficient power, variety and other desirable features. ErosTek has solved these shortcomings.

We Listen To Our Customers

We’re dedicated to listening to our customers and their input is extremely important to us. If you have any feedback, comments or suggestions, please email sales@erostek.com.