This interactive trainer has the most advanced resistance unit: the motor brake. In combination with the Tacx Trainer software 4, Advanced, the motor brake simulates a very accurate cycling experience. During a climb, the resistance on the rear wheel increases and during a descent the resistance unit speeds up, so it feels as if you are going downhill. The bike course is displayed on your computer screen. If you participate in online races, you ll also see all your competitors. Communication between the resistance unit, handlebar interface and computer is completely wireless.