WORKING PRINCIPLE: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. WEAR RESISTANT BASE MATERIAL:This magnetic lock is magnetically resistant, made of a wear-resistant material, vacuum treated with high-quality electromagnetic materials, and double-locked insulation. The aluminum casing is made of high-strength alloy and anodized. DC12V:This product produces a large magnetic field when it is in operation. Do not approach the magnetic sensor. The working voltage is 12VDC. If excessive voltage is used, the temperature of the lock body is too high or the control circuit is damaged. Check and remove foreign matter between the lock body and the magnet block in time to maintain good suction. APPLICABLE AREA: It is suitable for wooden door, glass door, metal door, fire-proof door,etc. This product can be widely used in your life. In today's society, every family's security control is very strict, everyone wants to live in a carefree state, so with this Lock, you don't have to worry about security, just take it with you if you like it. HIGH QUALITY SERVICES: We solemnly promise you that if you find problems with the product itself, you can contact us in time. we will definitely give you a reply in the first place and return it for you. please feel free to use it., Manufacturer: Sonew