UHPPOTE 600lbs Force Electric Magnetic Lock Fail Safe Mode 12/24VDC With LED For Single Door Access Control NC mode - (locked while supplied with power), fail safe mode Safety function: Built-in voltage spike suppressor Material: Stainless steel Holding force about 280kg (600lbs) Suitable For: Wooden door, Glass door, Metal door, Fireproof door Size: 250Lx48.5Wx25H(mm) / 9.84&#034;x1.91&#034;x0.98&#034; Armature Plate Dimension: 180Lx38Wx11H(mm) / 7.09&#034;x1.5&#034;x0.43&#034; Holding Force: 280kg / 600Lbs Input Voltage: 12 or 24VDC Current Draw: 12V/500mA or 24V/250mA Suitable: Wooden door, Glass door, Metal door, Fireproof door Surface Temp: Less than +20 / 68 Operating Temp: -10~+55(14-131) Humidity: 0~90%(non-condensing) Cover Finish: Anodized aluminum Lock Finish: Zinc Armature Plate Finish: Zinc Weight: 2.1Kg / 4.63lb 1 x Electric Magnetic Lock 1 x User manual 1 x Installation Kit Collinear Load Test 280kg / 600pounds Dual Voltage 12 or 24 VDC (optional) The Standard Voltage is 12VDC when Finished MOV Provides Reverse Current Protection Anti-Residual Magnetism Designed High Strength Material,Anodized Aluminum Housing Design without Mechanical Failure Increase the holding Force,Dual Isolative Housing CE Certificate by European Union,MA Certificate by China Public Security Office The screw of armature plate should not be fixed too tight. Proper elasticity should be guraranteed for the rubber ring so that the armature plate can adjust itself to the appropriate position. Please keep the surface of the lock clean, or the force will be reduced because of the dust, glue or scotch tape on it.