The LCD screen makes it easy to look at and go With the detachable head unit, you can quickly and easily assemble and disassemble the bike speedometer ACCURACY 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---Easy installation that only takes a few minutes for the wireless bicycle speedometer without the need to install complicated cables Thanks to its water resistance, it can 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 drive at night If no signal is input after 5 minutes, the screen will turn off automatically to save battery. When you move or press any button, the computer turns on automatically The package also comes with an extension bracket to fix the computer