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▲ Simple user interface, durable and maintenance free screen with SMT craft. ▲ 3 VGA input (desktop, laptop, digital display stand), 2 VGA output, high resolution 1920×1440/85Hz ▲ 4 audio input, 3 video input, 1 audio output Projector RS232 control (or infrared + RS232 control) ▲ Panel control, computer software interface control ▲ Projector time-delay power off protection, one button startup & shutdown, to ensure convenience and safety during use of projector. ▲ screen control ▲ Projector ATA input / output PTT: Power on the projector and lower the screen. ▲ Work together with XINYUAN card reading electronic control platform, swipe card to start up and close the door to shut down ▲ Work together with XINYUAN network controller, to be upgraded to economical network central controller easily ▲ Network port, USB port ▲ Extendable one button computer startup function ▲ Extendable electronic volume adjustment function ▲ 1 microphone input through low noise and high fidelity chip remix processing and electronic volume adjustment (add module) ▲ extendable individual desktop output ▲ Economical and practical, best for classroom | |