Function: 10 Frequency VibrationColor: BlackSize: 20.9 * 2.6 cm/8.2 * 1.0 inchNet Weight: 120 g/0.26 lb/4.2 ozPower: Lithium batteryCharging time: about 2 hoursUsage time: 50 minutesMaterial: ABS + SiliconePackage: Color BoxFurther: Waterproof/BendablePackage Size: 6 * 3.4 * 22.7 CM