The DKN R-400 rowing machine offers elegant design & sturdy construction that makes it one of the most stable rowers on the market, setting new standards for home training rowing machines. The drive belt is manufactured from the same material that is used in the automotive industry, making it not only very durable, but also very silent during use. The DKN R-400 rowing machine also features a double resistance system & an 11kg (24.2lbs) flywheel to provide challenging & smooth workouts & is one of the most silent air-magnetic rowers available currently on the market.