Function: 3 Frequency Knocking & RotatingColor: BlackSize: 13 * 3 cm/5.1  * 1.1 inchNet Weight: 185 g/0.49 lb/6.5 ozPower: Lithium battery/650mAhMaterial: ABS + SiliconePackage: Color BoxFurther: Waterproof/Knocking/RotationPackage Size: 18.3*18.6*7.3 CM