HDMI 2.0 Fiber Optical Converter. The device can transmit 1 channel 4K@60Hz HDMI with local video loop out,1 channel keyboard and mouse,1 channel bidirectional 3.5mm independent audio,1 channel bidirectional RS232 data through one core optical fiber,realizing no delay,no compression,high-quality signal extension of 10km . Designed for harsh environment use in temp. between -20/75°C.