The Fukuoku Power Pack is a non-cumbersome, wrist held power pack that enables you to use three Fukuoku 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 rheostat-control dial on the back of the power pack, so there is a whole extra level of control and adjustability, along with the subtlety and precision you get from the small fingertip vibrators. You receive an astonishing 25,000 vibrations per minute. Each finger gets a differently-textured removable latex slipcover. The size and portability makes it great for both masturbation and partner sex. And of course, for massage. 3 AAA batteries included.