The uVIBE DUO is a 3 speed, stretchy, reusable dual vibrating ring designed to comfortably fit all sizes. The thicker band constricts blood flow by keeping the blood in the shaft of the penis; the user will maintain a firmer and fuller erection during sex. The added pleasure knobs help provide a tighter and more secure fit for him which prevents the ring from sliding or moving, while the pleasure ticklers provide maximum stimulation for both. The 2 high-powered motors each feature 3 speeds, work independently, and have an easy, push button control to facilitate use as needed. The specially designed, thicker vibrating heads are the perfect size to ensure clitoral stimulation for her and testicle stimulation for him. The DUO is made of a high quality, ultra durable TPE material. Requires 6 LR936 batteries. Batteries included. The DUO comes in individual, sealed packages with hang tags. The back of the product feature instructions and guidelines.