Takes dual-motor vibrating rings to the next level by adding an attachment to make sure the boys get some action too. The Tri-O's unique design provides maximum sensation for both partners. It is made of the highest quality silicone and powered by two super-powered motors. The unique Ballerc attachment is designed to comfortably wrap around the testicles and gently stimulate them for added pleasure. The Tri-O is waterproof wireless reusable with replaceable batteries and includes a stretchy one-size-fits-all band.