Keys Fitness PRO 400 is a treadmill designed to meet your needs for cardiovascular exercise. It has a maximum capacity of 250 pounds and is intended for indoor use only. The treadmill features a 3-window LED console that displays time, speed, and calories burned. It also has 12 preset programs and 3 target heart rate programs. The treadmill has a cushioned deck to reduce impact on your joints, and it also has a safety key that stops the belt if you fall off.