Bell Free Fit Platinum Series 15 Function Wireless Computer Offers premium performance, wireless technology and a back-lit screen. The large, back-lit screen lets you see speedometer readout in low light riding conditions Functions include current speed, avg speed, max speed, current-to-avg speed, speed tendency, odometer, odometer save, Features also include trip distance, trip timer, 12/24 hour clock, calories burned, fat burned, scan, outdoor temperature, freeze frame memory No tools install; Battery included (1 button cell)