The DoubleO 6 vibrating erection ring is designed with two rings for a secure fit – one for the shaft and one for the testicles. It includes a powerful bullet motor and pleasure ticklers for maximum pleasure for couples. This double ring is reusable, waterproof, and made of latex- and phthalate-free SEBS silicone. The replaceable AG13 batteries last for over 80 minutes of mutual satisfaction.