Features: 1) Offers digital feedback The machine provides digital feedback on elapsed time,how many feet were climbed,rate of speed, and calorie burn. 2) Can fit in Doorway The ladder is only 27.25" wide,allowing it to fit inside most interior doorways. 3) Can use arms & legs The ladder's 40 degree angle offers natural climbing motion,which takes streets off of lower back,hips and knees. 4) Long,dynamic climbing strokes The long,dynamic ensures a full range of motion,while the giving you to option of exercising both your arms and legs.