This is the latest breakthrough in the history of HDMI dual-monitor KVM. Now you can connect more computers and more monitors through HDMI ports!A. If you have one this TESmart dual-monitor KVM, your four computers can switch at any time in dual-monitor mode for work, games, entertainment, etc., which is very convenient.B. If you have two this TESmart dual-monitor KVMs, your four computers can switch at any time in the quad-monitor mode, ultra-widescreen immersive gaming experience, multi-monitor display of stock information, etc.As long as your computers and monitors support dual monitors or quad monitors, then you can connect to our KVM to achieve dual monitors or quad monitors.Features?1. Support Unix/Windows/Debian/Ubuntu/Fedora/Mac OS X/Raspbian/Ubuntu for Raspberry Pi and other Linux basicsystem;2. Support resolution up to 3840*2160@60HZ;3. Support hot plug, disconnect or connect devices to the KVM at any time without turning off PC;4. With EDID emulators in each input port, keep PCs always have correct information, prevent displays setting change while switching input ports;5. Support front panel button, keyboard hotkeys, IR remote control and RS232 to control KVM;6. Available to use keyboard and mouse without any delay after switching input sources;7. With extra USB 2.0 port, it is possible to connect bar code scanner, USB hard device or other USB device;8. Support keyboard and mouse pass through mode to improve KVM compatibility;9. Support DCCI for cascading, achieve quad-monitor.Packing List?1 x Dual Monitor HDMI ports KVM Switch1 x IR remote control; AAA battery not includeded1 x IR Receiver cable1 x DC 12V power adapter1 x 3 Pins Connector (For RS232)2 x Rack-ears1 x AUX Cable for DCCI1 x User manual