Description:100% Brand New.Wired Bicycle speedometer with LCD display.Monitor your bikes' speed， distance and riding time.Wireless design is more convenient and good looking.Ideal assitant for bicycle training .Perfect to use when hiking， climbing， riding and other outdoor actives.Make your sports life more free and comfortable.Lightweight， durableNote:Just the accessory， the bike not included.Specification:SPD: Current Speed.ODO: Odometer.DST: Trip Distance.MXS: Maximum Speed.AVS: Average Speed.TTM: Toataltrip timeTM: Trip timeCLK: Clock (12H/ 24H).SW: StopwatchTemperatureTM up trip time upTM down trip time downTrip DN trip distance downComparatorMaintenance alertMachine oil reninderWver-speed reminderSerring tyre circumferenceSetting RATLow battery indicatorFreeze frame memoryAuto back lightWireless digital codeAuto Light (563C2， 563C3)Separated button (563C1， 563C3)Auto: ON/ OFF.LED BacklightPackage Includes:1 x Bicycle Wired Computer Odometer Speedometer.1 x Sensor.1 x Mounting Shoe.1 x CR203 Button Battery for Speedometer1 x 12V/23A Battery for the sensor6 x Cable Ties.1 x Wheel Magnet.1 x Manual User