Bike Computer Wireless Universal 16 Functions with Backlit Display,Automatic Start/Stop, Bike Speedometer,Bicycle Computer Features： Handy, Compact and Portable. Easy to install, easy to read LCD display, ideal companion for your bicycle Compact appearance design, multi-function stopwatch is economical Large screen & large font, provide two backlight modes (long / short light), which are clearly visible even in the sun, and the data is more convenient and safer to see. The analog coded radio used for the speed transmitter can a range of 60 cm and you get data on speed, distance,, etc. every you drive. Provide 3V CR2032 battery with up to 400 hours of battery life, which is more suitable for driving. Equipped with a new improved chip, the transmission speed and stability are significantly improved. No required, as long as there is a motion signal input, the stopwatch will start working automatically and you can record your trajectory at any. Predefined tire size, custom KM / M selection, backlighting, current speed, maximum speed, driving, automatic start / stop and other 16 technical support. Description： 【Product name】SD-546C luminous wireless bicycle computer 【Material】 Engineering plastic ABS electronic components 【Display】LCD display 【Size】 4.6*4.6cm/1.8x1.8in 【Power supply】 1 CR2032 button battery on the meter head; 1 12V 23A battery for the transmitter 【Colour: Black 【Backlight】 Green light/white Package Include: Odometer*1, wireless rotating base*1, magnet*1, cable tie*4, rubber ring*1, manual*1, wireless transmitter*1 sports & outdoors sports & outdoor sports & outdoor play toys sports equipment Bike Computer Wireless Universal 16 Functions With Backlit Display,Automatic Start/Stop, Bike Speedometer,Bicycle Computer