Function: 9 Frequency Vibration Color: Black Size: 18.2 * 3.4 cm/7.1  * 1.3 inch Net Weight: 108.5 g/0.23 lb/3.8 oz Power: Lithium battery/3.7V/140mAh Material: ABS + Silicone Package: Color Box Further: Waterproof/Wireless Package Size: 25 x 9.15 x 5.15 CM