Sunny Health & Fitness Hydro+ Dual Resistance Magnetic Water Rowing Machine $201.61 Make sure this fits by entering your model number. ADJUSTABLE TENSION: Boost the intensity of your full-body workout routine in a flash when you cycle between the 8 levels of magnetic resistance. Each level makes it progressively harder to produce rowing strokes. BELT-DRIVE MECHANISM: An effective exercise session does not have to be loud. The 5. 5-pound flywheel and smooth belt-drive mechanism on the rower result in a challenging, maintenance-free, and nearly silent workout experience.