The ProForm 505 CST Treadmill is designed to get you moving. This quality treadmill features 18 built-in workout apps and a quality sound system that's iPod-compatible. The 6-inch display screen is backlit and shows you how far you've walked, how many calories you've burned, and your heart rate. Additional Features: Speeds up to 10 MPH ProShox cushioning 6-in. backlit display screen Contact heart rate monitor About ProForm Synonymous with treadmills, ProForm had revolutionized the treadmill industry with the now world-famous SpaceSaver fold-away design.