Function: 16 Frequency Vibration Color: Black Insert Size: 20 * 0.4 cm/7.9" * 0.16" Handle: 14.5 * 4.5 cm/5.7" * 1.8" Net Weight: 116 g/0.26 lb/4.1 oz Power: Lithium battery Material: ABS + Silicone Package: OPP Bag Further: Waterproof