It is sad that a company like the German BEURER manufactured a below-average device to obviously sell it cheaply.
I bought it in 2010 from a store when I was abroad.

Ease of use: Moderate.
Output intensity: Low.
Usage programs: Minimal.
Screen: Good, easy to read.
Button convenience: Good (easy).
Appearance: Good.
Powered by 3 AA batteries.
Cables: 2 double cables where 8 electrodes are connected (2 electrodes per channel)
Electrodes: 8 pcs. Provided in the package.

Storytime:
First of all, I bought it firstly because it was four-channel and secondly because I liked its appearance.
But after about a year of use, the device "went crazy" so that when I pressed one button, another function was activated.
In the end, I got rid of it and found peace.
I was really disappointed. I will never buy a BEURER device again.

The device is quite good, many programs, nice packaging with a carrying bag and space for pads. However, its menu is significantly more difficult than similar devices from the same company that I have. And the instructions included as well as the online guides do not help at all.

There is a difficulty in setting up in order for someone to start a session. Some functions seem to be semi-automatic, nevertheless, for beginners like me. However, some programs that I have managed to set up and try (relief of Achilles tendon) have proven to be effective.

It is approaching three years of use. Very good machine with satisfactory programs. For relaxation and muscle relief, it simply works wonders. Personally, I have never put it on maximum intensity because I can't handle it. I don't know what my friends compare it to when they say it doesn't have intensity (maybe they are doing something wrong?). For this price, I don't think it has any competition.

Basically it has 2 programs..both in TENS and EMS and in massage, one program with pinching which is particularly annoying and one with massage. I have had it for about a year and I only use the second program for massage...all the others can only cause damage to you.. its intensity is very low to none.. I sit and press the electrodes hoping that the current goes a little deeper. Even if it has 8 channels, it's not worth its money.. I regret this purchase every time I have needed to use it... I just went to order another machine and this one goes in the trash...

It is good, it does its job... it is the only one at this price that has 8 electrodes... but the intensity is very low... I do not recommend it solely for the intensity

Very good product and affordable for the pocket. I bought it for about 105 euros 5 months ago and I use it almost every day. I use it for muscle tightness and joint pain after demanding crossfit workouts and the results are very satisfying. The tens and massage functions that I constantly use relieve the area where there is pain. I don't use the ems function much, so I can't evaluate it. Its battery lasts a long time, the intensity goes quite high. It has many programs and besides the default ones, you can create your own (if you know how to create them, I just play with the default ones). I highly recommend it!

You give 40-50 euros more and you get something much more user-friendly, reliable, and high-quality. I'm not saying it doesn't do the job, but it has an extremely difficult menu where you constantly need to have the instructions next to you to start the program you want. The time doesn't appear until the program finishes, and it doesn't have instructions for placing the electrodes (in different parts of the body) that other market TENS devices have. I used it for 1-2 months and unfortunately, it ended up in the closet. However, with 100 euros, you can't find a 4-channel device on the market. It has instructions in Greek and English and a 3-year warranty

It does many programs quite well. However, its construction in relation to its price... completely plastic. On one hand, it makes the device very lightweight and easy to carry with its little suitcase... on the other hand, if it falls down, I believe it will break very easily. Also, the battery cover opens with the slightest touch

For everyday use, it is excellent...lightweight, affordable, and very effective. It helps both with pain and muscle recovery (after difficult workouts or competitions). It is exceptional for the abs...of course, it requires maximum tolerable intensity to have results in terms of abdominal definition