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 reverse IR ,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.