Concept 2 Rowing Machine Replacement PM4 Monitor (Used / Reconditioned)

Standard on the Model E Indoor Rower. Can be retrofitted to Models D, C, B and A Indoor Rowers. Can take two D-Cell batteries. Equipped with rechargeable battery pack when purchased with a new machine. The rechargeable battery pack is not included in retrofit kits, because using a PM4 on older machines requires the use of two D-Cell batteries.