S4 Monitor Retrofit Retrofit your existing WaterRower to include the latest monitor offering, the S4 monitor. The S4 monitor uses a different pickup method to previous monitors and hence requires the top deck containing the sensor to be modified. The upgrade kit can be retrofitted to most machines by the owner and requires limited mechanical knowledge. WaterRower will install the upgrade free of charge at its premises, however the customer will be charged return carriage.
Click here for more information on monitor features