HKM02B-4K 4K HDMI KVM & USB, RS232 , IR, Audio over IP Extender Datasheet Application Firmware FeatureResolution up to 1920 x 1200@60Hz.Signal extension up to 150M over CAT5e (or greater) cable.Workable with Ethernet switches for HDMI extension, distribtuion, switching, and matrix.Built-in VGA/ DVI Loop-out port for an extra VGA/ DVI display at TX unit.Built-in 2 USB ports at RX unit for remote control.Supports up to 8 x 16 video wall function.Supports USB, RS232, IR, analog audio transmssion.Supports RS232 distribution function, from one TX to multiple RX.Managed by Windows based software, Android/iOS APP, IR(Infrared) remote, RS232, front panel buttons.