Function: 3 Frequency Knocking & Rotating Color: Black Size: 13 * 3 cm/5.1  * 1.1 inch Net Weight: 185 g/0.49 lb/6.5 oz Power: Lithium battery/650mAh Material: ABS + Silicone Package: Color Box Further: Waterproof/Knocking/Rotation Package Size: 18.3*18.6*7.3 CM