NOTICE: The running belt of any treadmill has an interface which is generally at an angle of 45° and about 10CM is normal The brand-new treadmill will have friction noise,which is a normal phenomenon. Generally the running time will disappear after about ten hours. Name: Multifunctional mechanical treadmill Product color: black Material: quality steel/foamed cotton/polypropylene/ABS Running belt size: 100 x 35 x 2 cm Running board size: 110 cm Folding size: 110x 50cm Net weight: 16kg Load: 150 kg Instrument panel: Time/speed/distance/calorie/walking/supine/twist waist manual measurement may have an error of 1 cm-3 cm Main functions: 1. Sit-up stand 2. Strong and stable suction cup 3. Adjustable armrest 4. Step mark 5. Bold support rod 6. Bracket extension