10 functions of passion! The waterproof Hot Pinks Stud is made of glittery soft jelly. The penis-shaped vibe measures 5.75" with a diameter of 1.375". The base of the shaft has a raised ring for stimulating the outer vagina. The base of the vibe has EZ touch controls for scrolling through the 10 levels of vibration and pulsation. Requires two AA size batteries, not included. Pink is the new passion!