Universal thru-beam sensor, large housing design, 30 m detection range, red light, 30 kHz transmission frequency, light/dark on, DC version, NPN output, PNP output, test input, pre-fault output, M12 plug, Ultra bright LEDs for power on, weak signal indication and switching state, Highly visible LED as alignment aid in receiver optics, Emitter deactivation, Various transmitter frequencies, Not sensitive to ambient light, even with switched energy saving lamps