This rower uses water as a resistance regulator. The sound of water and the feeling when rowing creates the impression of actual rowing outside. Because the seat is higher and easy to get onto, it is also perfectly suitable for rehabilitation use. With a comfortable seating and extensive training information on the monitor, this rowing machine is perfect for the most demanding user. Water Resistance Brake System. Upto 17 ltr / 4,5 gal Rotating Mass. Battery Operated Display. 135 kg / 300 lbs Max User Weight.