The Ring O 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. Additional Information: reusable fun. No batteries required. SEBS silicone. Latex and phthalate-free. Waterproof, non-vibrating cock ring.