The Humm Double Dinger Dual Vibrating Ring Glow-in-the-Dark. 2 motors for twice the fun. Prolongs erections for him. Orgasmic stimulation for her. Portable vibrating cock ring that can fit any size penis because of its super-stretch material.Twice the hummer! Humm Dinger Double Dinger is made of stretchy jelly. The erection enhancer fits around the base of the penis shaft. Two removable 1.125 inches by .5 inch bullets stimulate the testicles and clitoris. Each bullet has easy on-off control and last 40 plus minutes. Warning: May cause screams of intense pleasure! Humm Dinger is the brand name known the world over for its powerful motor and super sensuous stretch silicone, which is sure to please and tease both partners during intimate play time! Don't be fooled by the rest. Stick with the Best! It offers 40 minutes of continuous vibration and an easy on/off switch. Batteries are included for immediate use. Cock rings when worn around the base of the penis and testicles, many users find that cock rings increase sexual pleasure. Prolong rings, erection enhancement, climax control rings, cock rings. Humm Dinger Double Dinger Glow-in-the-Dark Vibrating Ring from Hott Products Unlimited.