Hydrotherapy Ring. USB Rechargeable. 2 x 10 Function Bullets. IPX7/100% Waterproof. Pumping but not as you know it. Bathmate has always been about gains. but for the first time with the addition of the Hydro VIBE. Bathmate pumps not only give you gains but they also create pleasure. 65 powerful vibration variations are achieved with the attachment of 2 x 10 speed IPX7 rated waterproof vibrating bullets. stimulating the penis in ways never before imagined. Bathmate's product testers all reported increased erection quality as well as a more comfortable pumping experience. It is indeed the best of both worlds! Designed to work in harmony with all Bathmate Hydropumps (except the Hydroxtreme11).