[AUTOMATIC CLOSING FOR SAFETY] The Fire Electromagnetic Door Holder is designed for emergency situations, automatically closing the door in Box/Cover of fire to prevent smoke and flames from spreading. Its special electrician magnet ensures no magnetism during power failures, making it a reliable safety device for homes and offices. [HEAVY DUTY ALUMINUM ALLOY CONSTRUCTION] Crafted from aluminum alloy, this door holder is built to last. Its layered inner cavity structure provides exceptional durability, with a maximum suction force of up to 80Kg, ensuring secure door holding even in high-traffic areas. [HIGH-EFFICIENCY PURE COPPER WIRING] The interior features pure copper enameled wire winding, which is resistant to high voltage and significantly improves working efficiency. This ensures consistent performance and long-term reliability for your safety needs. [SCIENTIFIC DESIGN FOR EASY INSTALLATION] With its excellent components and scientific design, this door holder offers simple wiring—just connect the positive and negative electrodes to energize. Its user-friendly setup makes installation quick and hassle-free. [MANUAL RELEASE FOR FLEXIBLE CONTROL] Equipped with a manual closing release button, this door holder allows for immediate door closure when needed. In Box/Cover of fire, it automatically cuts off power to close the door, providing an additional layer of safety and control., Manufacturer: Badafaci