Slim-line unit fits discretely at the side of the door curtain and includes everything to convert a manually-operated roller door to an automatic, remote-controlled door. Features built-in courtesy light, spring-loaded disengage cords and automatic force sensing which ensures the door operates safely at all times. Automatic Safety Cut-Out Eliminates Trapping Emergency Release from Inside 1 Year Guarantee Automatic Safety Cut-Out Eliminates Trapping Emergency Release from Inside 1 Year Guarantee