Function: 10 Frequency Vibration Color: Red/Black Size: 10 * 4.5 cm/3.9  * 1.77 inch Bullet Size: 7 * 1.1 cm/2.7 * 0.43 inch Net Weight: 120 g/0.26 lb/4.2 oz Power: Lithium battery Material: ABS + Silicone Package: OPP Bag Further: Waterproof