The auto spinning hula-hoop trainer is portable, lightweight and durable by design. Easily train yourself hula-hoop to lose weight and trim waist. Spinning the hula hoop is calorie-consuming aerobic exercise. But it is difficult to do it, especially for beginners. Auto spinning hula-hoop trainer lets you train your abs and waistline without manually spinning the hula-hoop. With the magnetic ball, the centrifugal force auto-spins the hula hoop with little effort, but all the same results. It applies 360° pressure to effectively train your abs and trim your waistline. Only need to adjust the size according to your waist size until the hula hoop can’t drop.