elite hydrobator masturbator is specially designed for use in the shower or bath. it is 100% waterproof and for full functionality it must be used in water. both sides are open so that the water can easily flow through and stimulate the penis. on the inside, the water is used for optimal stimulation of the penis. however, the elite hydrobator can also be used without water. the nub and rib structure provides additional stimulation. enjoy the 3 different speeds and 7 powerful vibration settings that encapsulate the entire penis when you turn on these features. it is perfect for use in the shower or bath and should be used with a water-based lubricant. it is also suitable for use in erectile dysfunction, as the elite hydrobator stimulates blood flow. it also helps delay orgasm. the masturbator can then be cleaned with sex toy cleaner and lukewarm water.