The LCD screen makes it easy to watch and go With the detachable head unit, you can quickly and easily mount and dismount the bike speedometer ACCURATE WITHOUT DELAY --- Using a premium chip, the bike computer can wirelessly capture real-time data It can help you plan and analyze your cycling training WIRELESS WATERPROOF --- Simple installation that only takes a few minutes for the wireless cycling speedometer without the need to install complicated cables Thanks to its waterproof can it be used on rainy days Dry immediately after use AUTO ON / OFF BACKLIGHT & amp; 3 COLORS --- The bicycle speedometer has 3 backlight colors: green/blue/red You can adjust the backlight permanently when you need to ride at night If no signal is input after 5 minutes, the screen will automatically turn off to save power When you move or press any button, the computer turns on automatically