Package contents: 2 packs bike speedometers, each pack contains 1 piece bicycle computer, 1 piece wireless sensor, 1 piece seat, 7 pieces plastic tie-wraps, 2 piece CR2032 battery, 1 piece magnet as well as 1 piece user manual; Please install the bicycle speedometer according to the user manualMulti-functions: providing total 14 functions for you to meet your different riding needs; The wireless bike speedometer can record the average speed, maximum speed, current speed (measured in mph/ kph unit), riding time, to keep track of your cycling more effectively and you can find more functions such as scan mode, speed comparator, maintenance, clock, etc.Wireless bike speedometer: featuring stable wireless transmission, the bicycle odometer can keep tracking of your cycling without network cable; Make the distance between the computer and the sensor at less than 60 cm to make them fully communicate while cyclingAuto on/ off design: the wireless bike computer is designed with an automatic power-on/ off function; It can automatically wakes from sleep mode; The bike computer will enter into sleep mode if showing no signals for 300 seconds and will automatically turn back to the previous mode with all the data collected once any signal is receivedA wide range of applications: the wireless bicycle computer can be applied to most types of bicycles, for instance, mountain bikes, road bikes, electronic bikes, folding bikes; When you are cycling outside, take the bike computer with you to provide the real-time record