Dark backlight optical acquisition: Using dark backlight optical acquisition instrument, effectively solve the interference of dry fingers and outdoor strong light on the equipment, ensuring high-precision recognition Multiple identification methods: Support fingerprint, ID card (IC optional), password and various combinations of identification methods, flexibly adapt to different needs, and provide higher security Diversified communication: Support /IP, USB, U disk, RS485 and extended WIFI and other communication methods, adapt to various network environments, and make data transmission more convenient All-round security protection: With anti-disassembly alarm, coercion alarm, door open alarm function, and support professional access control functions such as Wiegand signal input and output, door magnetic detection, anti-submarine, double door interlocking and fire linkage, comprehensively improve security Convenient function design: The device comes with doorbell function, easy to use, adapt to a variety of application scenarios, and further improve user experience