This is a wonderful Electro Shock system, although I may enjoy it sensually once in a while, I bought it more as a TENS machine, and since having used it for that purpose, many aches and pains have been alleviated to such an extent that my wife and I can make use of the other toys we enjoy, for much longer, and with "really happy endings!" In fact, I'm thinking about purchasing a second one, as my wife is starting to needs some electro massage now too!