The DKN R-400 Rowing Machine has an elegant design & truly sturdy construction that makes it one of the most stable rowers around, setting new standards for Home Training Rowing machines. The drive belt is produced of the same material as used in the automotive industry, making it not only very durable, but also very silent when in use. The DKN R-400 Rowing Machine features a double resistance system, combining an airfan with a magnetic resistance, connected to a 11kg (24.2lbs) flywheel. The R-400 is one of the most silent air-magnetic rowers available in the market.