Built of aluminum alloy and treated with surface oxidation, making it suitable for indoor scenes. Embedded reverse current protection equipment. Built with anti-wear materials and has an anti-residual magnetism design. Displays the status with the LED indicator. 5-wire that supports door detector signal feedback. Has a long service life, allowing it to be powered on up to 40,000 times as indicated by the aging test. Completely relies on the electromagnetic force and is free from mechanical failure. Automatically unlocks the door when the device is powered off. Suitable for doors made of a variety of materials such as wood, glass. Compatible with all Dahua access control devices, and other mainstream access control devices.