NC lock = Normally ClosedNo power →  unlockedPower ON →  locksNC = Needs power to stay closedSuperier low temperature, Time delay designLower power consumption, Enviromental protectionAuto-relock if no Action within 5 secsDoor status signal output contact (NC/NC/COM)Safe & durableWorking Measure: power-on to lockSuitable for: Wooden Door,Glass Door,Metal Door,Fire Proof Door2 Wire with Low Temperature & Time DelayInput Voltage: DC12VWorking Current: 900mA; Static Current: 100mAWorking Measure: Fail safe, Locked when powered oon.Fail-safe type:: Power to lockCoil type: Continuous workingSolid Bolt: polishing housing, 800Kg Holding ForceSurface Temp: Low TemperatureInduction Distance:8mmDimension: Face Plate: 205Lx35WX40H(mm) / Strike: 90Lx25Wx2H(mm) / Bolt diameter: 16mm;  Bolt length: 16mmOperating temp: -10~+25℃（14-131F）Operating Humidity: 0~90%Special Designed: Tested to 500000 cyclesFace place material：High Aluminum, Carrulous Line Finished