I have one TENS only I can use. The others feel like bee stings. This one is by Reli Med. There is a pulsing massaging effect, several setting. $75 on the website. The p doc had a rep there to promo but they wanted $150 and did not take insurance....scam to me.

It was the best investment I made. For my traps, and my lower back.

google relimed tens or reliamed