The usb rechargeable sm390 masturbator gives you a completely new masturbation  experience. slide your penis, with some lubricant, in the shaft and let yourself be pampered by the telescopic movement. put on the heating function for maximum pleasure. the sm390 has 7 programs and 3 speeds + ' sex moaning ' function. this masturbator is rechargeable, has a removable, washable silicone shaft making it simple and easy to clean with water and soap or a toycleaner. the masturbator itself is not waterproof and should therefore never be immersed in water.maximum charging time 2 hours and with a fully charged battery you can enjoy 1 hour of play.telescopic masturbationheating functionsex moaningusb rechargeablesplashproof3 speeds7 programswith protection sheetmaximum input up to 4.5 cm