The Vibrating Power Cage is the ultimate erection enhancer. With four super stretchy rings wrapping around your penis, you will maintain rock hard erections and prolong the fun while you stimulate your partner. Hidden inside the cage is a powerful cordless micro vibe that delivers internal thrills with each thrust. You will enjoy thick, throbbing erections and your partner will love the cage's added sensations. Features a powerful micro bullet. Includes freee batteries. Cage measures 3.5 inches long by 1.3 inches inner diameter.