Zacro Bike Computer with Compass Key Ring The appearance will be more concise and easy to use; Easy-to-read LCD display : big LCD display with big numbers so you can easily see the stats even you are riding Portable and convenient: It is very small and light but you can have the basic info you need in monitoring your biking activity, measuring speed ,distance, riding time, maximum speed and average speed Wireless and water resistant design: You attach the sensors to your front fork and your spokes and you're good to go The backlight can be set in either green and white color Including road cycling, mountain biking, folding bike, common bicycle,also attached a Compass key ring