<b>Specification:</b><br> Mode: 10 different vibration<br> Material: silicone<br> Max Noise: =<50db<br> Battery: 170mAh rechargeable lithium battery and 3V 2032 button cell<br> Power: USB 5V, 150mA, DC charging<br> Continuous Service Time: 2 hours<br> Waterproof Rate: IP65<br> Wireless Remote Control