Low voice,easy to setting the precise and credible limiting Characteristic1: the system use two same tubular motor and a control box;2: the system should adopt good quality fabric.3: it can be used for slope canopy, curve canopy and trapezoid canopy.4: max limit is 12 meter, max area is 50 square meter.5: when the system width is more than 3 meter, need add a bracket; 6: when the limit is long, ...