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.