Add another stud to your bedroom routine! The Colt Vibrating Stud is made of Silicone and includes a micro vibrator. The enhancer ring is stretchy and will fit most sizes. The bullet sleeve and face of the cock ring are nubbed with feelers to tickle and bring added sensations. The removable 1.75" x .625" micro-bullet has an on/off button for easy activation. The micro-bullet requires 2 cell size batteries (4 included) to provide powerful vibrations. Get enhanced lovemaking... all night long!