Myse Wave Spa I've used it a few times, but haven't used it since and have been storing it at home. There is no box or instruction manual. Type: EMS Area: Whole body Power supply: Rechargeable AC type Waterproof: Waterproof function available Immediate purchase O.K. From the official website: Simultaneously outputs EMS (electrical stimulation) from four rollers that reproduce powerful and complex kneading. A full-fledged body & face care beauty device in the palm of your hand. 1. Complex kneading like an esthetician Four rollers arranged to fit the whole body reproduce the movements of an esthetician's hands. It comfortably and firmly pinches and lifts the areas of concern, kneading them vigorously. 2. Full-fledged EMS Triple tightening waves of low frequency - medium frequency firmly stimulate various rhythms of the muscles. EMS while kneading with the rollers stimulates a wide range of muscles. --------------------