19 Functions & Accurate for RidingThis odometer for bicycle works well to measure speed, distance, ride time, calorie counter, etc. It is helpful to adjust the speed to complete the ride plan on time, adjust the rhythm of your cycling to have a better exercise effect. Our bike speedometer equipped with powerful intelligent movement and strong magnet, more stable and more interference-free, making data more accurate. Large screen with Backlight & Easy ReadOur bicycle speedometer has 2.2 inches screen with 3-line data display, the bicycle computer with big and clearly numbers, thus the data can be easily read from all angles. The first line displays current speed, and the second line displays temperature, the third line you can set display other data. The backlight is easy to turn on/off and makes the riding data easily visible IPX6 WaterproofAs a rider, bad weather conditions cant be completely avoided at medium/long distance riding. So the most important performance for cycling computer is WATERPROOF. IPX6 meets all your needs. In addition, soft green backlight protect your eyes and helps you to read the data easily even in the darkness. Automatic Wake-upAfter no signal inputs of 3 minutes, the bicycle computer screen will go into a standby sleep mode. When press any button or just turn around bike wheel, the wireless bike odometer will automatically wake up. Bike tracker keep save energy and super convenient, no worries about forgetting to turn off the bike mile tracker after every use. Lightweight , waterproof and wireless design make it suitable for most types of bicycles and any seasons InstallationPackage of the speedometer for bike contains a manget, a sensor, a bracket and a screen. Installation of the bike computer wireless requires a cross screw driver for magnet. The nagnet mounted on spokes; the sensor mounted on fork and the screen mounted on handlebar with bracket. It would be better to see video or manual before installation