Function: 9 Frequency Vibration Color: Black Size: 11.2 * 5.1 cm/4.4" * 2" Net Weight: 54.1 g/0.11 lb/1.9 oz Power: Lithium battery/3.7V/140mAh Material: ABS + Silicone Package: Color Box Further: Waterproof/Magnetic charging/Wireless Package Size: 20x 7.15x 4.65cm