Stair Stepper Exercise Equipment Step Machine for Exercise Features:1. CONVENIENT: this climbing stepper is simple in design and a real space saver. It is slim and lightweight so that you can fit it in any corner of the house. 2. EASY STORAGE: When you’re not using it, the Climbing Stepper folds and stores in any corner or closet. 3. Constructed from steel bearings, vinyl covered molded foam arm pads and adjustable hand grips. 4. COLLAPSIBLE AND ADJUSTABLE FRAME: It is convenient to carry and storage as your mobile fitness assistant owing to its collapsible frame. The adjustable height can meet more needs of people who are different height. 5. Warranty: We support 30‑Day Free Return, Worry‑Free 12‑Month Quality Warranty and 24 hours friendly customer service. Specifications: Color: gray + black Size: Approx. 50 x 43.5 x 34 cm/19.7 x 17.1 x 13.4in Main Material: Steel alloy + PP How e:1. Adjust the bottom knob first, and adjust the height of the pedal. If the height does not reach the sensing distance, it will not be counted. 2. If the pedal height is adjusted and still does not count, adjust the sensor rod again, push the sensor rod head on the front riser a little bit inward or pull it out a little bit, and then adjust to the sensor count. Package Content: 1 x Stepper 1 x User Manual