WaterRower Natural Rowing Machine w/ S4 Monitor & Hi Rise Attachment Handcrafted made in USA 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