Function: 2 * 9 Frequency Vibration Color: Black/Rose/Purple Size: 9.4 * 3.2 cm/3.7" * 1.2" Net Weight: 84.7 g/0.18 lb/2.9 oz Power: Lithium battery/3.7V/240mAh Working time: 30-70 minute Charging time: 60 minute Noise: <40 Decibel Material: ABS +...