2022 Newest Solar Power Cycling Computer Bicycle Speedometer and Odometer Wireless Waterproof Cycling Odometer LCD Backlight -- Description:2022 New Design - SOLAR ENERGY: With solar panel, the mph bike speedometer can automatically charge under sunlight or light, it will provide extra power to the bike meter, while built-in 2 batteries to maintain its ordinary electricity. Environmental protection, extend battery life and save money. When installing the sensor with a battery, pay attention to the power connection points. (press the iron piece so that the battery and equipment are fully in )MULTI FUCTIONS and WIDE APPLICABLE: Built-in 22 functions, the bike speedometer works well to measure speed, distance, riding time, calorie counter etc., which requires a serious cyclist or fitness fanatic. Small size, lightweight and wireless design make the bicycle computer wireless suitable for most types of bicycles (may not fit some types with large spokes)AUTO SLEEP WAKE UP FUNCTION: After no signal inputs for 300 seconds, the wireless bicycle speedometer screen will turn on to sleep mode to standby mode with LCD displays. When you shake the bike computer or any signal is inputted or any button is pressed, this cycle computer will automatically wake upWIRELESS & WATERPROOF DESIGN: Wireless and waterproof design makes the bike mile tracker more convenient and durable. Never worry about complex installation of wires on the handlebar, no need to worry about rain. Simple installation that only takes a few minutes. Easy to navigate interface with only two buttons to access all your waterproof bike computer measurements. Just enjoying your ride.