Concept 2 rechargeable battery pack for PM4 monitor only rower parts | eBay
Buy LiveRowing Concept 2 Cable Connector for PM5, PM4, PM3 and Apple Smartphones Helps Save Your Battery While Working Out - Includes The LiveRowing App - Rowing Machine Accessories for Your Concept2
When Good Ergometers Do Bizarre Things - MaxRigging
PM3/PM4 Use Manual | Manualzz
PM4 Rowing Machine Performance Monitor User Manual PM_manual_0806.indd Concept II