Wrist Watch Adjustable Size Vibration Cock Ring Function: 10 Frequency Vibration Color: Black Size: 8 * 5.9 cm/3.1  * 2.3 inch Net Weight: 66.1 g/0.14 lb/2.3 oz Power: Lithium battery Material: ABS + Silicone Package: OPP Bag Further: Waterproof