Description Powerful FunctionWant to know how fast you are? The bike computer can tell you that! It measures speed, distance, calories burned, ride time and more any cyclist or fitness fanatic needs. Bike Speedometer Odometer has 19 functions to give you a better riding experience. Touchable BacklightBicycle speedometer adopts a glare-free backlit screen, and by touching the Mode key and the Set key at the same time, you can keep the backlight on all the time. Simultaneously tap again to turn off this mode. You can read data more easily and clearly, day or night. Excellent Waterproof PerformanceIP64 waterproof protection, so that the bicycle computer can work normally in rainy days(Do not put directly into water). So you don"'"t need to worry about the complexity of installing wires to the handlebars, the wireless waterproof design is simple and practical, but don"'"t put it in a rainstorm, stay in water or in heavy rain. Power Saving & Auto SystemBuilt-in auto on/off function means you don"'"t have to worry about wasting battery power. This cycling computer will automatically enter sleep mode after 5 minutes of inactivity and display your last ride data when you press any button or simply ride. As long as there is a motion signal input, the stopwatch will automatically start to work and record your track at any time. Expansion BracketOur bicycle computer comes with universal bracket and extension bracket (only for 22.2-31.8 handlebar diameter). The stand expands your field of vision while you ride and reduces the need to look down 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 fluctuating data, and the distance exceeds 50cm, which does not affect all data) 2. The distance between the magnet and the sensor should be about 5mm, the closer the better. 3. The magnet faces the back of the sensor battery.