The treadmill with 12 levels auto inclines . so . you just press “+” to increase and press “-” to decrease which helps you get more convenient and efficient exercise on this auto incline treadmill. When not in use . the incline on this treadmill machine will auto back to its original position. Multi-functional LCD Display: The blue backlit LCD monitor of the treadmill will display data about your exercise . including speed . distance . calories burned . time . heart rate . and more. Work out more efficiently and scientifically. With 15 preset programs . the running machine allows you to enjoy easy one-button operation. The height of the armrests on both sides of the treadmill by 3 inches . to allow customers to run more comfortably on the treadmill.