I love these small but very powerful massagers on my neck. Fully rechargeable too! So many different speeds and cycles I can't even learn them all. My wife likes them too. Great for our arthritis. Can even use it in the bathtub to soothe achy spots. It has a well hidden waterproof jack for charging but don't try to charge it in the tub. It won't work while charging so that shouldn't be a problem. I don't want to see anyone get electrocuted. The 3 buttons on the end are textured. The first bitton near the small end turns it on and off. The next button toward the big end sets the intensity/speed and the 3rd button you will just have to try for all of the different pattern/cycles that are available. A charge will last way longer than you need and it can be recharged at any time you are done using it so it will be fully charged for the next time. A very satisfying massage for everyone.