PM4 (Performance Monitor 4)



Current PM4 Firmware versions are:

  • Indoor rowers—Version 318 or 29, depending on monitor age
  • SkiErgs—Version 709

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  • Works with rechargeable battery pack on some machines
  • Can take two D cell batteries


  • Compatible with Garmin, Suunto and ANT SPORT chest belts
  • Compatible with Polar heart rate equipment when Concept2 heart rate receiver and cable in use

Date of Manufacture Location

To locate the date of manufacture on a PM4:

  • From the Main Menu, go to More Options > Utilities > Product ID and look at the value next to Datecode.

The year of manufacture is represented by the last four numbers of the date code. Any numbers before that indicate the day of the year. For example, 1562007, means the monitor was manufactured on the 156th day of 2007.

Note: This date code, the monitor serial number and hardware version will not change when firmware is updated.