Function: 9 Frequency Vibration/Twisting Color: Black Size: 11.5 * 3.5 cm/4.5  * 1.37 inch Insert: 6 cm/2.36 inch Net Weight: 666 g/0.14 lb/2.3 oz Power: Lithium battery Material: ABS + Silicone Package: Color Box Further: Waterproof/Twisting