【Powerful Function】Want 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 Backlight】Bicycle 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 Performance】IP54 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 waterproof design is simple and practical, but don't put it in a rainstorm, stay in water or in heavy rain. 【Power Saving amp; Auto System】Built 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 Bracket】Our 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.