Overview: Engineering Material Plastics, LCD Screen, Electronics component; Two-line four window displays 3V CR2032 Lithium batteries 1 Can be used the bicycle needs wheel diameter 50CM-99CMTwo-line four window displays for easy viewing data without frequent adjustment button Luminous function to facilitate the night view 28 Functions:SPD----CURRENT SPEED ODO----ODOMETER (0-99 999 KM) DST----TRIP DISTACNEMXS----MAXIMUM SPEED AVS----AVERAGE SPEED OTM----TOTAL TRIP TIME TM----TRIP TIMERTM----RIDING ALL TIME CLK----CLOCK (12H/24H) SW----STOPWATCH TEMPERATURE (-20oC ~ 90oC temperature) TM UP----TRIP TIME UP TM DN----TRIP TIME DOWN TRIP UP----TRIP DISTANCE UP TRIP ND----TRIP DISTANCE DOWN " " amp; "-' ----Comparator SETTING SPEED SCALE (km/h, m/h) MAINTENANCE ALERT LOW-SPEED REMINDER CARE REMINDERSETTING TYRE CIRCUMFERENCE (0 mm ---- 9 999 mm)SETTIN THE LAST value OF ODOMETER / ODO SETTING OTM FREEZE FRAME MEMORYLCD BACKLIGHT LOW BATTERY INDICATOR TEMPERATUREAUTO ON/OFFSpecification: Weight Approx:108.3g Size Approx:11 x 9 x 4