Solar Bicycle Computer Model: Wireless Size: 6*5*1.3CM Gross Weight: About 98.4g Net Weight: About 31.6g Application: MTB, Road bike Color: Black Package Content: 1*Head device, 1*Bracket, 1*Sensor, 1*Magnet, 2*Rubber slice, Plastic strap Feature: Backlight, Multifunctional, Easy to use, Base assembly 22 Functions: 1. Memory function 2. Speed tendency 3. Current speed 4. Odo odometer 5. DST distance 6. MXS Max speed 7. AVS average speed 8. TM Riding time 9. CLOCK 10. Backlight 11. CAL calories level 12. Temperature 13. Low power indicator 14. Auto Sleep mode 15. Tool free assembly 16. KM/hr & M/hr setting 17. Scan 18. Fast scan 19. Setting ODO 20. Speed comperator + - 21. Solar power 22. Auto start/stop Mode Switch Press right button to change the mode. Note The solar energy is designed to extend the battery life, and it cannot fully charge the battery. It is just an additional function that can absorb a part of the energy, so that it can be used for a longer time, if it runs out of power, still need to recharge. Long Backlight-press Two Keys At The Same Time To Turn ON/OFF Backlight Short Backlight-4 Sec In Backlight When Press Any Key Power Saving Mode There is no motion signal input within 300 seconds, the screen display will enter the sleep state, and the clock will remain. Press any key to wake up and display the mode before shutdown, and remember the values before shutdown. Riding time-The riding time will be recorded all the way as long as the bicycle computer has electricity(the intention of the factory design is to record a certain journey of time).The battery is installed in the when