Features an advanced PM5 Performance Monitor, improved ergonomically designed handles, adjustable foot-rests, and a flywheel designed for smooth movement with minimal noise. The Model D has a comfortable 14" (seat) height with an aluminum I-beam monorail and stainless steel track for a consistent back-and-forth slide. When done training, you can quickly break down the rower into two segments for storage or use the included caster wheels for easy transport