Efficient Stair Climbing: Tired of struggling with heavy loads up the stairs? No more worrying about strength or back strain. This electric stair climber, with a capacity of up to 440lbs, is here to solve your lifting problems. Enjoy the ease you deserve! It works on carpeted stairs if the carpet is securely fixed, and is also suitable for wooden, concrete, and metal stairs, both indoors and outdoors, with protective pads to avoid scratching.