NC lock = Normally ClosedNo power →  unlockedPower ON →  locksNC = Needs power to stay closedSurface mounted, no need to drill a hole on frame, Safe & DurableLower power consumption, Enviromental protectionAuto-relock if no Action within 5 secsWorking Measure: power-on to lockSuitable for: Wooden Door,Glass Door,Metal Door,Fire Proof DoorInput Voltage: DC12VWorking Current: 900mA; Static Current: 100mA.Working Measure: Fail secure, unlock when energizedFail-safe type: Power to lock (The lock is NC)Dimension: L150xW34xH28(mm)Operating temp: -10~+25℃Operating Humidity: 0~90%Special Designed: Tested to 500000 cyclesFace place material：Zinc Alloy, Carrulous Line FinishedDoor status signal output contact (NO/COM)Weight: 0.6Kg