The LCD display makes it easy to watch and go. With the removable head unit, you can quickly and easily assemble and disassemble the cycling 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 & amp; WATERPROOF --- Easy installation which only takes a few minutes for the wireless bicycle speedometer without the need to install complex cables. Thanks to its waterproofness, it can be used on rainy days. Please dry immediately after use. AUTO ON / OFF BACKLIGHT & amp; 3 COLORS --- The cycle 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 entered after 5 minutes, the screen will automatically turn off to save battery power. When you move or press any button, the computer will automatically turn on.