Operating voltage: 12 or 24Vdc Brushed aluminium Current draw: 500mA at 12Vdc x 2 (at 20°C) Magnetic bond sensor monitor output remotely monitors the door lock or unlock status. Operating temperature: -10 to 55°C (14 to 131°F) Humidity: 0 to 95% non-condensing Locks surface temperature: ambient temperature ±20% (when power is on) Holding force: Up to 600lbs x 2 (272x2kg) Weight: 4.0kg (approx)