【KVM Switch 4 Ports】KVM Switch HDMI 4 Ports allows you to switch between 4 computer. Use 1 set of keyboard and mouse to control 4 computers and 1 monitor without having to buy additional monitors, keyboards and mouse. 【8K@60Hz & 4K@144Hz】 This USB 3.0 KVM Selector Box supports high resolutions up to 8K@60Hz and 4K@144Hz, making the image more delicate and lifelike and is backwards compatible with low resolutions. USB HDMI Switch 4 in 1 out also suitable for ultra wide monitors. Our KVM switches 4 computers 1 monitor are HDMI 2.1 compatible. Please use high quality 8K HDMI2.1 cables less than 1 meter to solve flickering and black screen problems. 【EDID Emulator】USB 3.0 KVM Switch HDMI 4 Port with EDID functionality to ensure you get the best resolution and refresh rate. When switching computers, the original window will not be destroyed. 【KVM Switch USB 3.0 up to 5Gbps】 4 ports USB3.0 KVM switch supports transfer rates up to 5Gbps, 10 times faster than USB2.0 480 Mbps. KVM Switch HDMI USB 3.0 can connect keyboard, mouse, printer, USB stick, scanner and other USB devices. This means you don't have to change cables every time you want to use a different device. 【2 Switching Modes】Plug and play, switching setup is easy, the wired controller can easily switch between 4 computers and 1 monitor via the 4 switch buttons or 1.5m/4.92ft wired remote control. 4 indicate light which computer is active and the included DC12V power adapter supplies power to the KVM Switch 4 PC. You can turn off the screen at any time using the ON/OFF switch on the KVM Switch 1 Monitor 4 computers. 【3.5mm Audio Output】4X1 KVM Switch has a 3.5mm audio output hole that can be used to connect headphones. The sound is transmitted to the monitor via the HDMI port and also transmitted to external headphones. 【packaging list】4 PC KVM switch+4 select USB 3.0 cables+wired remote control+DC12v power adapter+user manual