NU Sensuelle Remote Control 15-Function Bullet USB Rechargeable Cock Ring is Amazingly Powerful, yet discreet and quiet. -15 Functions -USB Rechargeable Bullet -USB Rechargeable Remote Control -Charge time: 1 hour -Running time: 40-60 minutes -Bullet Material ABS -Ring Material SEBS -100% Waterproof-Submersible -1 Year warranty