FXA1PU-M57 is a 4K DisplayPort 1.2 KVM fiber optical extender, which is consists of a transmitter unit FXA1PU-57L and a receiver unit FXA1PU-57R, extends 4K 60Hz (4:4:4) DisplayPort, 7.1 channel audio and 3 x USB-HID signals up to 500m (1,640 foot) over single one LC Duplex Single-Mode fiber cable and compatible with the most popular resolutions. The leading-edge visual lossless light compression technology allows 4K signal long-distance transmission and free of EMI interference.