Features: Closes/locks when power is off, unlocks when power is on. More flexible than other similar products, suitable for spring-loaded doors weighing 0.5~4kg. Emergency opening: The main body locks in the emergency opening position, allowing for manual emergency opening. Energy saving: Unlocking time is less than 1 second; the door is usually left open, resulting in lower energy consumption. Durability: 500,000 cycles of continuous 10-second testing ensure the coil never burns out. Safety: 280kg load capacity, resistant to significant permanent deformation, with shockproof and tamper-proof design. Applications: Widely used in schools, mines, factories, supermarkets, logistics areas, military units, prisons, courts, hotels, bathroom centers, etc., for applications such as refrigerators, food delivery cabinets, logistics cabinets, mailboxes, lockers, wardrobes, vending machines, etc. Installation: Compact size, no need for left/right or front/back separation, easy to replace for installation. Both products can be installed on the sides of a wall or recessed; Dimensions: 72 * 13.3 mm; Material: Metal; Color: Black; Package contents: 3 * Electromagnetic locks, 3 * Latches. This package only includes the items listed above and does not include other products. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement tolerance is +/- 1-3 cm.