Intuitive one-button control with hands-free scroll mode. 2� screen size with easy-to-read digital display. Trek-Certified Service reminders based on selected bicycle types. Key features include speed (current, avg., max.), distance (trip, total), time (clock, timer) and calories burned. Sensor includes magnet guidelines to simplify set-up and installation. Includes mount, analogue sensor, CR 2032 battery and wheel speed magnet.