This is a really lovely neck massager/stimulator. I actually purchased it for my husband. He uses a TENS unit and absolutely loves it, so I thought he would love this as well and he does. I was a little worried, myself, and have never tried his TENS unit. However, both my husband and son-in-law love this neck massager, so I finally could not resist trying. Oh my, it does feel amazing. I love the warmth with the massage/stimulation. I work at my computer a lot and this is so helpful for a sore or stiff neck, either from work or from sleeping position soreness. I love how lightweight this is, as well as how easy it is to use. It fits us each perfectly and we can each adjust it to the level we prefer. If you are considering this, I can certainly recommend it. Also, the fact that two hours of charging is good for about 20 massages/stimulation sessions is great. Portable and easy to enjoy!