The Fukuoku 27K is a lightweight and noncumbersome, multi-speed massager with dial up controls that sits on your wrist like a watch. It's sleek and compact design has adjustable finger fitting rings. You can attach one, two or all three fingers. At full speed, Power Pack sends out up to 27,000 vibrations per minute. Includes three different 100% surgical grade silicone texture stimulation tips all with different sensations. 3 AAA batteries are included.