Operating range: 0 ... 3.5 m, light transmitter: LED, light type: red, alternating light, 626 nm, signal output: 2 PNP, short-circuit proof, reverse polarity protected, open collectors, switching type: light/dark switching, connection: fixed cable 150 mm with connector M12 x 1, 4-pin, operating voltage: 10 ... 30 V DC, class 2, ambient temperature: -20 ... 55 °C (-4 ... 131 °F)