The Velo 9 is CatEye's entry level wired 9 function bike computer made simple with pre-programmed tire sizes.Along with current, average, and max speed measurement, track your trip distance, elapsed time, and odometerFeatures auto start / stop for accurate measurementsPre-programmed tire sizes makes setup simpleLarge screen is easy to readCalorie consumption and a carbon offset measurement to help you track how much of a difference you are makingPace arrowBattery: 1, CR2032 Lithium Metal, 3(V), 0.735(Wh), 0.3g, Included CatEye Velo 9 Bike Computer Bike Computers UPC: 725012038093