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4 core DVI video light end machine products by sent device and receives device composition, through single core fiber put computer of DVI video signal, and audio signal, and RS232 serial signal extended to distal, user can in distal real-time view listening to to computer hosts of image and voice, remote control terminals,; transmitter ring out along DVI video interface, convenient user local view displayed; receiver output along video signal, resolution Supreme support to 1920x1080@60Hz, Transmission distance of up to 2 km (multimode)/20 km (single-mode).