Feature |
PM3

|
PM4

|
| "No touch" on and off (Rowing turns monitor on automatically. Monitor turns off after several minutes of inactivity)" |
Yes |
Yes |
| Self-calibrating (enables accurate and consistent tracking of performance) |
Yes |
Yes |
| Display |
Bitmapped Monochrome, 3"x3" active area, 160x160 resolution |
Bitmapped Monochrome, 3"x3" active area, 160x160 resolution |
| Onboard memory |
1Mb Flash |
2Mb Flash |
32k Removable memory card (32k LogCard stores workout data and personal preferences for up to 5 users)
 |
Included
|
Included
|
Display Options
|
5 display screens |
5 display screens |
All data - review all your performance data on one screen

|
Yes |
Yes |
Force Curve - analyze your stroke in real time
 |
Yes |
Yes |
Pace Boat - pace yourself or race against a previous workout

|
Yes |
Yes |
Bar Chart - plot your output or heartrate on each stroke

|
Yes |
Yes |
Large Print - easy to read simplified display
 |
Yes |
Yes |
| USB port (allows monitor to be connected to a PC for data analysis and use with third party software.) |
Yes (15' USB cable included) |
Yes (15' USB cable included) |
'ANT' Wireless and RJ45 connection for PC'less racing |
No |
Yes |
Heart Rate Monitoring Options:
|
|
|
| Polar-Heart Rate belt compatibility |
Yes (Requires optional Polar receiver available from Concept2) |
Yes (Requires optional Polar receiver available from Concept2) |
| Suunto 't6/t3' Heart Rate belt compatibility |
Not compatible |
Supports wireless communication with Suunto HR belt (1 Suunto HR belt included with every PM4) |
| Built In "Fish Game"

|
Included |
Included |
Rowing Machine to Rowing Machine Race Options
|
| PC based machine to machine racing up to 80 machines |
Requires connection cables, PC, additional software and hardware. |
Requires connection cables, PC and additional software. |
| Direct machine to machine racing using no additional PC (up to 8 machines) |
No |
Yes, with optional RJ45 cables |
| Direct machine to machine wireless racing (no cables or pc required. Up to 8 machines) |
No |
Yes |
Power Supply
|
| Works with Rechargeable Battery Pack. |
No |
Yes (included) |
| Rowing recharges Concept2 PM4 battery pack (battery pack may also be recharged by connecting the PM4 to a PC through the USB port) |
No |
Yes (requires Model D or Model E rowing machine) |
| Power Saving Features - Rowing provides supplemental power to extend battery life. |
Yes (requires Model D or Model E rowing machine) |
Yes (requires Model D or Model E rowing machine) |
| Works with Standard D-cell Batteries - (non-rechargeable) |
Yes (included) |
Yes (not included) |
| Future Upgrades possible - Increased memory capacity to allow for future expansion and additional features. |
No |
Yes |