The Macho Crystal Partner's Pleasure Ring Clear super stretchy vibrating sensation for both. The look of glass. The feel of jelly. Double vibrating bullets with stimulating nubs. 7 functions. Easy to operate. Push button power control. Waterproof vibrations for play outside the bedroom. Vibrating cock ring requires 4 AG10 batteries, included. Made using phthalate free, non-toxic material: SEBS. Cock ring measures 3.875 inches long. Always clean before and after use. The Macho Crystal Partner's Pleasure Ring Clear from Nasstoys of New York.