Function: 10 Frequency Vibration Color: Black/Black + Red Size: 8.8 * 4.7 * 3.8 cm/3.4  * 1.8 * 1.5 inch Inner Dia: 3.3-3.7 cm/1.3-1.4 inch Net Weight: 49 g/0.1 lb/1.7 oz Power: Lithium battery Material: ABS + Silicone Package: Color Box Further: Waterproof