The Screaming O RingO Rangler Cannonball is a super-stretchy erection ring that keeps him harder longer with a fuller erection, mind-blowing orgasms and premature ejaculation prevention. It is also great for keeping condoms in place and an excellent addition to any penis pump. Choose your favorite (or try all 3) and saddle up for a firm, hard ride! Reusable fun – no batteries required. SEBS silicone. Latex- and phthalate-free. Waterproof.