Attached around the bellows of any of our Hydromax penis pumps, the HydroVibe includes two powerful, detachable completely rechargeable bullet vibrators placed on each side of the pump. When you start out your routine, just turn these on, and you`ll start to experience ultra-powerful vibration. This results in a major increase in blood flow to the penis, giving you an even better level of gains from your workout! The HydroVibe itself is made of body-friendly silicone, while the two vibrators (available separately as the Bathmate VIBE Bullet) are completely IPX7 waterproof, and each offer 10 vibration patterns. With each unit adjustable separately, there`s an incredible 100 different options for the HydroVibe - find a pattern that really works for you.