This device is a sensible alternative and in my opinion also "low"
The TENS unit is kept simple, and even those who do not read descriptions, after a few trial runs quickly come to their favorite program and well understand the handling.
Especially high quality are the supplied pads, which can be exploited repeatedly, since they are washable!
In the long run are the washable pads cheaper than the disposable things!
If I had the choice again, I would choose again for the Omron E2 :-)