The Vibrating Cock Sling is the ultimate erection enhancer! With two super stretchy rings wrapping around your penis, youft.ll maintain rock hard erections and prolong the fun while you stimulate your partner. Hidden on top of the sling is a powerful cordless micro vibe that delivers incredible internal thrills with each thrust. Youft.ll enjoy thick, throbbing erections and your partner will love the bulletft.s added sensations. Try it in the shower or spa and turn bath time into pleasure time. Length is 5.5 in., inner diameter 1.5 in. Includes free batteries.