Automatic Wake-up Function Automatically wakes up from sleep mode when it detects vibrations in the bicycle. Bright LCD Screen Compatible with easy viewing of cycling statistics. Multi-functions Small size, 46*46*18 mm, lightweight, wireless, waterproof design makes it convenient and durable. This bicycle computer measures speed, distance, and cycling time. Exactly what every serious cyclist or fitness fanatic needs to know Compatible with statistics measurement. Day and Night Backlight Provides backlight Compatible with easy viewing during dark hours. The backlight automatically turns on when a button is pressed between 6:00 PM and 6:00 AM. Please note that the slight rattling sound from the device is a normal phenomenon, which is due to the design of the wireless automatic function. Easy to Install and Use Simple installation that only takes a few minutes. Easy to navigate the interface with just two buttons Compatible with accessing all measurements. Can be adapted to most common tire sizes Compatible with accurate statistical measurement. Applicable Compatible with road bikes, mountain bikes, folding bikes, and other common bicycles are compatible with this bicycle computer. This bicycle computer MAY be incompatible with some electric assist bicycles. If the computer screen, sensor, and magnet can be installed within the specified distances, the device should be fully compatible. Please feel free to contact us if you have any questions.