DS-K3B220X

4 pairs of IR light detectors: Permissions validation and anti-tailgating. LED light indicates passing direction. Valid passing duration settings: System will cancel the passing permission if a person does not pass through the lane within the valid passing duration. Door remaining open when fire alarm triggered: The door wings will be free status. Built-in access control board and card readers. Support speaker and remote control keyfob optional, need to order separately. View Less View more