This odometer for bicycle works well to measure speed, distance, ride time, calorie counter, etc. It is helpful to adjust the speed to complete plan , 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. 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 As a , bad weather conditions can't 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. After 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. , waterproof and wireless design suitable for most types of bicycles and any seasons Colour:black Material:plastic Size:. 68 x 56mm Package Contents: 1 x Bike Computer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.