IOGEAR 4-Port HDMI Multimedia KVM Switch with Audio, USB 2.0 Hub and HDMI KVM Cables, GCS1794 Share an HDTV or Display with HDMI connections, keyboard, mouse with digital surround sound between 4 of USB / HDMI computers and devices 2 x USB 2.0 peripherals sharing ports. Dolby True HD and DTS HD Master Audio Support Multi-platform OS support - Windows, Mac, Sun Solaris, Linux Complete keyboard and mouse emulation for error free booting and real time switching Power on Detection &amp;ndash; automatically switch to the next powered on computer Firmware Upgradable. Asynchronous hotkey switching between KVM focus, USB peripherals, and Audio ports DynaSync supports EDID to eliminate delay or change of video resolution when switching 3 years warranty Supports up to 4K UHD resolution 3840 x 2160 @30Hz, using comparable 4K monitor and 4K source