About this item This fits your . Make sure this fits by entering your model number. This is a non-motorized treadmill, unpowered, mechanical walker. The height of the armrest is adjustable, and the slope is adjustable in three grades to meet people of different heights. Hand-held heart rate test design, control the running speed by controlling the heart rate, and improve the exercise effect. The mechanic walking machine is driven by the friction between the athlete's feet and the running belt. The mechanical treadmill is an active running device, and its power source is the user's hips and knees. The ankle and associated muscles generate a backward thrust. Push the treadmill to produce movement. If you encounter any problems before and after purchasing, please feel free to contact us through "Contact Seller", our professional customer service team will reply your questions within 24 hours.