Just like with Jacobs Ladder, YOU control the speed. The higher up you go, the faster the stairs come. It has a initial step height of only 10” and it will fit where other stair climbers won’t with a ceiling height requirement of only 8 ½ feet. Stairway is the only commercial stair climber that does not need a plug, so you can put it anywhere in a gym without being tied to a wall. It is also easy to move around so, it can be used in a personal training environment. It is the stair climber for all ages!