3. Signal feedback: The four wire signal feedback magnetic lock is equipped with a normally open and normally closed alarm signal function, with signal feedback, which can be used in conjunction with the alarm system to Use, higher security. Widely applicable. 1. Security and anti-theft: The magnetic lock adopts anti-theft design. When the door is locked and closed, the electric lock is in a suction state with the iron block, and the external screw is an internal hexagonal screw 2. We are equipped with wrenches for unlocking, which cannot be opened by outsiders, providing you with a safe living environment. 4. This magnetic lock is equipped with magnetic lock matching iron blocks and screw accessories, as well as a hexagonal wrench. There are also fixing holes and rubber bands to make installation and more stable, anti destructive, and overall beautiful and generous., Manufacturer: Akfldms