IRONMAN Exerpeutic 250 Manual Treadmill EXTENDED WEIGHT CAPACITY: Tested up to 260lbs of user weight. PULSE MONITOR: Heart pulse sensors allows the user to measure target heart rates zones and heart pulse levels MANUAL INCLINE: Quick Release (patent pending) incline adjustments features quick and easy 2 position incline levels of 9% and 12% respectively QUIETNESS: The precision balanced 7 lb flywheel provides quietness during operation. It will not interfere with watching TV or listening to music.