... door, sliding door, rolling door, Door Accessories, Door opener(Motor),Door operator,etc..Grage door opener feature:1.economical mode ... 8W at stand-by situation2.run:5minutes short load3.motor:DC step-b-step motor with transformer and over load protection4.position limit protection ... after operation6.control:single boards with CPU control 24 DC third pulse=close7.speed:14cm/s,flexible control,setting ...