WIRELESS BICYCLE METER YT-813 WATERPROOF LCD MTB Automatic wake-up functionally wakes up from sleep mode when vibration is detected on the bike. Clear LCD throw away easy-to-view driving statistics. Multifunctional sizemall Size, lightweight, wireless, waterproof design makes it comfortable and durable. This bike computer measures speed, distance and riding time. Exactly what every serious cyclist or fitness fanatic needs to know for statistical tracking. Day and night illumination provides illumination for easy viewing in dark hours. The backlight will automatically turn on when you press any button between 18:00 and 06:00. Please note that a small rattle sound from the device is a normal phenomenon, which is due to the design of the wireless automatic function. Easy to install and install, which only takes a few minutes to complete. Easy to navigate interface with only two buttons to access all measurements. Customizable to the most common tire sizes for accurate stat tracking. Packing list: 1 * bicycle counter 1 * mountain tritite 1 * round magnet 1 * rubber seal 1 x User Manual (English) #3788 emi