* S66 adopts type C steel galvanization rail, chain type. * Automatic door open and close movement position check, manual
regulation is not needed. * Automatic door movement resistance curve check. It can adopt the
resistance change after long period door movement; Manual load
regulation is not needed. * The full automatic check will be finished only by pressing the
button twice, easy operation. * Unique patent technology of door lock when power cut keeps you
away from trouble of power cut. * Three types of rated power (600N, 800N, 1000N), for different
dimension garage doors.