6 pairs of IR light detectors: Permissions validation and anti-tailgating. Self-detection, Self-diagnostics, and automatic alarm. System will cancel the passing
4 pairs of IR light detectors: Permissions validation and anti-tailgating. LED light indicates passing direction. Valid passing duration settings: System
4 pairs of IR light detectors: Permissions validation and anti-tailgating. LED light indicates passing direction. Valid passing duration settings: System
