Cal Exotic was the first novelty company to introduce rechargeable technology, and we know how convenient that is, compared to trying to find fresh batteries at the most inopportune times! Now comes the world's first rechargeable, 100-percent waterproof, silicone vibe: Tenacious Bunny - aka A Girl's Best Friend. Push-buttons in the base control the speed of the powerful vibrations, as well as the direction of the swirling beads in the shaft.