WaterRower M1 HiRise Rowing Machine with S4 Monitor Handcrafted rowing machine with "water flywheel" that replicates actual rowing feel Flywheel sits in enclosed water tank to provide smooth, quiet, self-regulated resistance Series 4 performance monitor tracks workout intensity, stroke rate, heart rate, and more Coated tubular steel construction complements other commercial equipment; extra-tall seat Stores upright; measures 84 x 30 x 22 inches (W x H x D) and weighs 200 pounds