Description:【Powerful Function】Want to know how fast you are? Your bike computer can tell you! Measures speed, distance, calories burned, ride time and more for cyclists or fitness fanatics. The bicycle speedometer odometer has 19 functions to bring you a better riding experience.【Touchable Backlight】The bicycle speedometer adopts glare-free backlit screen, and by touching the Mode key and Set key at the same time, you can turn on the backlight all the time. At the same time, tap again to turn off this mode. You can read the data more easily and clearly, day and night.【Excellent Waterproof Performance】IP64 waterproof protection, so the bicycle computer can work normally in rainy days (do not put into water directly). So you don't have to worry about the complexity of installing wires on the handlebar, the wireless waterproof design is simple and practical, but don't put it in the storm, stay in the water or in heavy rain.【Energy Saving and Automatic System】Built-in auto on/off function means that you don't have to worry about wasting batteries. This bike computer will automatically go to sleep mode after 5 minutes of inactivity and display your last riding data when you press any button or just ride. As long as there is a motion signal input, the stopwatch will automatically start working and record your song at any time.【Extension Bracket】Our bike computer comes with a universal mount and extension bracket (only for handlebar diameter 22.2-31.8). The stand expands your field of vision while riding and reduces the need to look at the monitor, thereby reducing stress on your shoulders and neck for a more comfortable ride that looks cooler and more professional. Functional Overview: Automatically wake up while riding Change battery data storage (20 seconds) Backlight function (user selectable) No cycling for 300 seconds to enter power saving mode Installation requirements: 1. The distance between the sensor and the host is less than 50cm, the host can receive the signal and work, the closer the better. (The computer sometimes displays variable data, and the distance exceeds 50cm, which does not affect all the data)2. The distance between the magnet and the sensor should be about 5mm, the closer the better.3. The magnet points towards the back of the sensor battery.