Function: One Frequency Vibration Color: Black Size: 7 * 4.6 cm/2.8" * 1.8" Net Weight: 19.2 g/0.04 lb/0.7 oz Power: 2 Cell Material: ABS + Silicone Package: Color Box Further: Waterproof Package Size: 12.5 x 7 x 3.9 cm