GIYO M4 Bicycle Computer Bluetooth Wireless Road Bike Speedometer Odometer, GIYO M4

1. Input: DC 5V, 500 mA
2. Host battery capacity: rechargeable 800 mA, can be used for more than 80 hours at a time without the backlight
3. Sensor battery: replaceable battery, CR2032
4. Wireless working frequency band: 2400-2483, 5MHz
5. Operating environment temperature: -10-40 degrees Celsius
6. Waterproof rating: IPX5
7. Display: 2.5 inches
8. Use Bluetooth 4.0/ANT + communication protocol for wireless data transmission