1. Voltage: 3.7V
2. Charging time: 20 minutes
3. Battery: polymer lithium battery (130 mAh)
4. Dimensions: 51x50x24 mm
5. Material: ABS
6. Small size, easy to carry
7. Easy Bluetooth connection, more intimate use
8. Use: Unplug the plug to emit a 130-decibel alarm sound and trigger the SOS automatic alarm function through the APP. Double-click the button to quietly alarm and send SMS/telephone/real-time location