SUAOKI Wireless Bike Computer Bicycle Speedometer Bike Odometer with LCD Backlight, 5 Language Displays, Auto Power On/Off Systems, Multi Function for Cycling Speed Tracking: the unit can tracks your speed with a top display of your current speed, and a bottom display of the max and average speed. It also shows you if you're currently going slower or faster than your average speed Multiple Functions: 2 users data recording, 2 speed units and 5 language displays to choose by long press left button, meanwhile, it also features a stopwatch, odometer, time recording, calorie counter, CO2 carbon offset and more Auto Systems: auto reading of cycling data with 7-day memory function and auto power on/off without fiddling with buttons or wasting battery power; please note that the embedded steel ball would slightly rattle to automatically switch on and off Big Backlit Screen: 2 buttons operation, this gismo features a big backlight screen and therefore you are able to read all your data easily and clearly, in particular while you are in a dimly lit Ideal Design: no need to pair, the water resistant computer can mount easily onto your bikes front wheel with less than 60cm gap to the cadence sensor that is a 3mm gap to the magnet for accurate speed tracking and auto recording