Slot width: 30 mm, Light source: LED , 640 nm pulsing, Light type: modulated visible red light, Signal output: 1 NPN short circuit protected, reverse polarity protected, open collector, Switching type: light/dark on, Connection: M8 connector, 3 pin, Operating voltage: 10 ... 30 V DC, Ambient temperature: 20 ... 60 DegreesC ( 4 ... 140 DegreesF)