SD-558A wired&back light bicycle computer

Manual: http://www.sunding.com/uploads/SuoMingShu/SD-558A-EN.pdf

Functions:
  1. SPD   CURRENT SPEED
  2. ODO   ODOMETER (0~9999km/m)
  3. DST   TRIP DISTANCE
  4. MXS   MAXIMUM SPEED
  5. AVS   AVERAGE SPEED
  6. TTM   TOTAL TRIP TIME
  7. TM   TRIP TIME
  8. RAT   RIDING ALL TIME
  9. CLK   CLOCK (12H/24H)
  10. SW   STOPWATCH
  11. TEMPERATURE (-20℃~70℃)
  12. TM UP   TRIP TIME UP
  13. TM DN   TRIP TIME DOWN
  14. TRIP UP   TRIP DISTANCE UP
  15. TRIP DN   TRIP DISTANCE DOWN
  16. COMPARATOR
  17. Km/mile SELECTION
  18. MAINTENANCE ALERT
  19. CARE REMINDER
  20. OVER-SPEED REMINDER
  21. SETTING TYRE CIRCUMFERENCE (0mm~9999mm)
  22. SETTING THE LAST VALUE OF ODOMETER/ODO
  23. SETTING THE LASR VALUE OF TOTAL TIME
  24. FREEZE FRAME MEMORY
  25. LCD BACKLIGHT
  26. LOW BATTERY INDICATOR
AUTO ON/OFF
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