Extend KVM signals up to 30 km over fiber via SFPDisplayPort or HDMI dual-head 4K transmission up to 30 km over fiber cable.Supports DisplayPort and HDMI video up to 3840 x 2160 at 30 Hz.Transparent USB 2.0 extension supports HID devices, mass storage devices.Bidirectional audio via speaker/mic connectionSupports RS-232 peripheral (serial) devices such as scanners or terminals.Supports dual 4K view video source transmission (one PC with two video output ports).Local video port loopback for monitoring on transmitter (TX) unit.SFP BUNDLE 20km / SM 1310NM