This unique, adjustable cock ring is perfect for use around the penis and balls. It can be adjusted as much as you like.. This cock ring makes your erection feel harder and last longer. It also creates extra sensitivity for your balls. Turn on the vibrating stimulator so your partner can enjoy the extra stimulation, too! This cock ring is made from silicone and operates on 3 LR44 batteries, included. Use water-based lubricant and clean the toy with a special toy cleaner after use.