Function: 10 Frequency Vibration Color: Black Size: 18.7 * 6.2 cm/7.4" * 2.4" Insert Size: 4.5 * 4.5 cm/1.8 * 1.8" Net Weight: 161 g/0.35 lb/5.7 oz Power: Lithium battery Material: ABS + Silicone Package: Blank Box Further: Waterproof Package Size:...