Aluminum vibrator has a powerful motor that offers 10 functions of pulsation and vibration. Can be used by itself or with its silicone sleeve and both are waterproof. Requires 2 AAA batteries, included. Vibe measures 6.5 in. long, 6.25 in. insertable, 0.7 in. wide. Sleeve covers the length of the vibe and the width ranges from 1.1 to 0.8 in.