This HDMI KVM Switches allow you to use one set of keyboard and mouse to control 2 computers and share a monitor or 2 monitors extended or duplicated display with dual head input. Keep your workspace tidy and make your life simpler and more efficient. This HDMI USB KVM switch supporting resolution 4K x 2K@30Hz/3D/1080P resolution, make image display more exquisite and realistic, color will be bright and moving, really give a feast for your eyes. Note: Only when both your source and monitor support 4K@30Hz then you can get 4K effect. Industry-leading technology with multiple switching modes.Key switch; Mouse switch (Drive-free); Keyboard hotkey switch(Drive-free); Automatic scan switch (Drive-free, adjustable interval (8-999 second)) This USB KVM HDMI switch box works with great compatibility, driver-free for Windows 10/8/8.1/7/XP/Vista and Mac OS, Linux, and Chrome OS, simply plug and play. Also support HDMI devices like webcam, hard disk player, game console, DVR, NVR, etc.