Super value for money, but ...

The extensive programs and the clear display makes the E4 into a true treasure chest.
The equipment is complete - you can practically immediately upon receipt begin therapy.
The manual is understandable, clear and comprehensive.

The device is also stable under load (used daily by me in several patients in a row, on home visits, is therefore also carried to and fro, transported, falls down times ...)

However, I would also recommend the very good instructions supplied, a physiotherapist or doctor (with the additional designation pain) to consult in order to exploit the full benefits of the device and its many functions.

Patients who themselves want to try different things sometimes, or just need a good, dependable companion, which makes them reliable and fast painless, should perhaps compared sometimes look at the E2 model that is cheaper and just as clear to use, but a few functions has less that really only really physiotherapy or pain therapeutic guide or over a long period testing and tinkering can be accessed in my opinion.

Conclusion:
Ingenious device for TENS experienced patients or under expert guidance.
For beginners who are not regularly in physician contact, the E2 is less stressful, making as fast painless and is on top of everything cheaper.