With this toy you'll barely have to lift a finger for a mind-blowing time. The buttons for the pulse wave vibration are easily accessible so you can concentrate on what's at hand. Made from 100% silky smooth medical-grade silicone (hypoallergenic), it is totally waterproof (IPX7), and extremely quiet at under 60db. It contains a USB magnetic rechargeable lithium-ion battery, that when fully charged with its USB cable, it will provide 40minutes of passionate playtime.