【Multi-functions】Cycle Computer measures your riding data like Speed Average, Maximum and KM hour, Riding time and distance. Added new function like record calories statistics, temperature, etc. Small and portable, waterproof design, Exactly what any serious bicyclist or fitness fanatic needs to know about this bike accessories【Day & Night Backlight 】Provides backlight for easy viewing during dark hours. The backlight will turn on when You simultaneously press the "SET" and "MODE" keys to turn on the backlight manually, The brightness is very clear and does not irritate the eyes, which an effective function for crossing tunnels or dark paths【IPX6】You may encounter bad weather such as rainstorm during cycling. Hilceriy speedometer for bike can completely travel in rainstorm (According to multiple test results that large-scale contact with rainwater in rainstorm may lead to inaccurate temperature function, which mean water temperature is measured instead of air temperature, the rest functions will work normally, bicycle speedometer will not be damaged in this case)【Auto Wake-up Function】The bicycle computer will enter the standby sleep mode when there is no signal input for 3 minutes. When you touch the screen of the bicycle speedometer or start cycling, the bike odometer will automatically start working and, remember the values before the sleep mode and can also re-record the data according to your needs【Applicable】Road bicycles, mountain bikes, folding bikes,and other common bicycles are compatible with this bicycle accessories. This bicycle computer MAY NOT be compatible with some electric-assist bicycles. If the computer display, sensor, and magnet can be installed within the specified distances device should be fully compatible. Hilceriy team will be ready to serve you