Operating voltage: 12 or 24Vdc. Aluminium. Current draw: 500mA at 12Vdc. 250mA at 24Vdc (at temperature 20 °C). (SPDT rated 3A at 12Vdc). Status LED lights. Operating temperature: -10 to 55 °C (14 to 131 °F). Humidity: 0 to 95% non-condensing. Lock’s surf