WaterRower SIII V1.0, V1.5 and V1.8 monitors suffer from a design defect which means they do not measure power applied - speed and distance readings are unfortunately completely misleading.

RowH2O fixes this defect and offers industry standard calibration to typically within 5-10 seconds or better per 500m split vs Concept 2 times when using RowH2O Air Ergo mode.

Note - Newer SIII Version 2.5 monitors are only calibrated for single water levels and at a very slow calibration ( in fact slower than a single scull). RowH2O provides industry standard Air Ergo speed and distance readings for V2.5 users.