Sensing range: 10 ... 50 mm, light transmitter: LED, light type: red, alternating light, 640 nm, signal output: 2 push-pull outputs, short-circuit proof, reverse polarity protected, overvoltage proof, switching type: light/dark switching, connection: 4-pin, device connector M12 x 1, operating voltage: 10 ... 30 V DC, class 2, ambient temperature: -20 ... 55 °C (-4 ... 131 °F)