Features: 1.During the closing process, the locking tongue does not touch the lock, no collision, no noise. 2.Double?headed lock, double protection inside and outside, can be opened with mechanical key, anti?tailing. 3.Incorrectly unlocking, or no one enters or exits after unlocking, the door will automatically lock after 5?8 seconds to ensure safety. 4.It has positive and negative control unlocking function and building intercom, access control and system matching. 5.There is an indicator light on the lock head, which can be used as lighting for opening the door with a key at night while prompting the working condition of the lock. Specification: Features: During the closing process, the locking tongue does not touch the lock, no collision, no noise. Double-headed lock, double protection inside and outside, can be opened with mechanical key, anti-tailing. Automatic sound and light prompts for the working state of the lock. Incorrectly unlocking, or no one enters or exits after unlocking, the door will automatically lock after 5-8 seconds to ensure safety. In case of power failure or circuit failure, the key or handle can be used for emergency unlocking. It has positive and negative control unlocking function and building intercom, access control and system matching. There is an indicator light on the lock head, which can be used as lighting for opening the door with a key at night while prompting the working condition of the lock. Synchronous motor, metal gear, more rugged and durable.Equipped with a mounting kit for easy installation. Manually unlock support. An external remote control device can be connected, which can be selected by the user and can be opened by wireless remote control. Can be adapted to the left and right doors (rotate 180 degrees lock). High security and high security. Suitable for homes, offices, schools, hotels, factories, warehouses, etc. Specifications: Condition: Brand New Color: Silver Material: Zinc Alloy Input voltage: DC 12V or 24V adjustable (factory default is 12V, if you use 24V, you need to debug the terminal of the board) Static current: