<p>1. Mode:10 Different Modes</p> <p>2. Material: Food-grade silicone</p> <p>3. Max noise:<50db</p> <p>4. Battery:170mAh rechargeable lithium battery and 3V 2032 button cell</p> <p>5. Power:USB 5v 150mADC charging, charging time about 1H, use time about 2H.</p> <p>6. Waterproof Rating: IP65</p>