Easy to read: Big LCD display with big numbers??easily see the stats even you are riding</br>Backlight and Waterproof secures bike computer works properly at night and rainy day</br>Wireless design: Allows for easy installation without need for extra wiring on your handle</br>15 Functions: odometer??current speed??average speed??maximum speed??trip dista"t</br>Easy to install and suitable for all types of bicycles: Mountain biking?? Folding bike?? Common bicycle etc</br></br>Product Description</br></br><b>Usage Tip</b><br><br> 1.The computer can not work when enter into sleep mode?? so when you start riding?? pls