Operating range: 0 ... 20 m, light transmitter: LED, light type: red, alternating light, 640 nm, signal output: 1 NPN, short-circuit proof, open collector, switching type: light switching, connection: device plug M12 x 1, 3-pin, operating voltage: 10 ... 30 V DC, ambient temperature: -25 ... 60 °C (-13 ... 140 °F)