The Tantus Vibrating Super Soft C-Ring features the original best selling Super Soft ring with a waterproof removable bullet vibrator. The Super Soft Vibe Ring is 10 mm e wide or approximately .39 inch and stretchier than standard Tantus C-rings, making a safe, beginner friendly addition to couple's play that is both comfortable and exciting. Safe for your body. Made from Tantus own unique formula of 100% Ultra Premium Silicone. Easy to clean. Eco-friendly, hypoallergenic, hygienic, boilable, bleachable and dishwasher safe. Unstretched diameter: 1.5 inches, stretched diameter 4.75 inches. Please note vibrating ring requires batteries. Two 357 Duracell batteries are included. How to put on a c-ring: Step 1 place a small drop of lubricant around the inside of the ring. Step 2 carefully place the testicles through the ring, one at a time. Step 3 slide the penis through the ring. How to turn on c-ring: Step 1 remove bullet vibrator from ring. Step 2 twist open bullet vibrator and remove paper tab between batteries. Step 3 put bullet back into ring. Step 4 press firmly until click to power on/off.