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 odometer - Features auto start / stop for accurate measurements - Pre-programmed tire sizes makes setup simple - Large screen is easy to read - Calorie consumption and a carbon offset measurement to help you track how much of a difference you are making - Pace arrow - Battery: 1, CR2032 Lithium Metal, 3(V), 0.735(Wh), 0.3g, Included