The ORIGINAL world's smallest most powerful fingertip massager! The Fukuoku Power Pack is a non-cumbersome, wrist held power pack that enables you to use three finger-tip Fukuokus at the same time. Three tiny fingertip vibrators plug into a battery-operated power pack, which straps onto the back of your hand with an adjustable wrist strap. There is a control pack on the back of the power pack, so there is a whole extra level of control and adjustability! You receive an astonishing 25,000 vibrations per minute. Each finger gets a different textured removable latex slipcover. The size and portability makes it great to use alone with with your partner. 3 AAA batteries included.