Rich Japanese designed 6.5 inch shaft has reversable rotation and ridges bound to provide endless excitement. A tantalizing beaver tongue has three strength levels from light flicker to intense lapping. Exciting variable speed vibration for the shaft and beaver tongue are activated with easy to use push button controls at the base of the Aquasaki. There are separate controls for shaft rotation, rotation direction and beaver tongue vibration. Use one setting or use them all at once. With its waterproof construction, the Aquasaki is the new standard for waterplay toys. Requires 3 AA batteries not included.