This electric magnetic lock consists of an electromagnet and an armature plate used for access control door locks. By attaching this to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate, holding the access control door lock shut. When power off, the door will open. It is suitable for wooden door, glass door, metal door, fire-proof door,etc. Specifications: Locking Mode: NC Working Voltage: DC 12V Working current: 12V/400mA Material: Aluminum alloy shell + iron plate Holding Force: 280kg(600Lbs) Lock Size: Approx. 22.6*3.9*2.8cm/ 8.9*1.5*1.1in Plate Size: Approx. 18.1*3.8*1.2cm/7.1*1.5*0.5in Package Weight: Approx. 1700g/60oz Package List: 1* Magnetic Door Lock 1* Mounting Kit 1* User Manual Note: 1. This product produces a larger magnetic field when working. Do not approach the magnetic sensitive element. 2. The working voltage is 12VDC. If 24VDC is used, the temperature of the lock body will be too high or the control circuit will be damaged. 3. Be careful to check and remove foreign body between lock body and magnetic iron block in time to maintain good suction.