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. Automatically unlocks the door when the device is powered off. Compatible with all Dahua access control devices, and other mainstream access control devices. Suitable for doors made of a variety of materials such as wood, glass, metal and fireproof materials.