Please read the product description carefully before buying! If you have any questions, please contact us in time, we will reply you the first time. Functions: SPD Riding speed ,ODO Total riding mileage ,DST One-time riding mileage MXS Max speed ,AVS Average speed ,TM Riding time ,CLK (12H/24H)/time SCAN Auto cycle ,BACKLIGHT ,SW Stop watch function ,TEM Temperature Tire circumference set ,Riding date sampling function ,Total mileage initial setting