Curve-Crank technology - smooth zero impact performance. Curve-Crank helps to overcome discomfort of "dead spot". Dual action w/ upper and lower body workout. Enhanced backrest support cushion. Metal fan cage air resistance flywheel allows fluid exercise and breeze. Manual tension control adjusts resistance levels with the turn of a knob. Gel-style seat adjusts vertically and horizontally. Features a monitor with built-in media shelf. Monitor displays calories burned time distance and speed. Non-slip and foot straps.