DS-K3B631TX

20 pairs of IR light detectors: Permissions validation and anti-tailgating LED light indicates passing direction Audible and visual nipping alarm: The barrier will stop working for a period of time when detecting obstruction when open/close barrier Self-detection, Self-diagnostics, and automatic alarm 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 barrier will open automatically when alarm is triggered. View Less View more