Water Rower Natural Rowing Machine in Ash Wood 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 Solid ash and stained honey oak construction absorbs sound and vibration Stores upright; measures 84 x 21 x 22 inches (W x H x D) and weighs 117 pounds