Industrial-grade wide voltage power input9~55V, Professional import485chip, with built-in dual-channel relay outbound call output, a dedicated face recognition mainboard for elevator control, industrial-grade8inchipshigh-definition display screen, a dedicated interactive interface for the stand-alone professional elevator control scenario, and a rich variety of elevator control scenario applications on the device side. A dedicated mini-program for face recognition elevator control, a dedicated cloud platform for face recognition elevator control, supporting offline reverse scanning of QR codes for visitor sharing, supporting wired,WIF1,4Goptional, a professional technical service team for software, hardware, and cloud services, supporting300or880fingerprints.