Important: After connecting the computers and the monitors through KVM, you need to set the screen output mode on the computer (press Windows+P) and select the output mode in the pop-up window on the screen.We offer 12 months warranty. If you have any questions about the product, please contact us. Note:This USB 3.0 Dual Monitor KVM Switch requires 2 HDMI input for each computer and 2 HDMI output for monitors. However, most computers especially laptops do not have dual HDMI output, thus reliable adapters will be needed for non-HDMI outputs like VGA, DVI, USB C, DisplayPort. Please be aware of this before order! If your computer only supports single display, then this product cannot help you get dual display function. Convenient Switching modes and Wide Compatibility: 1. Toggle selection on front panel; 2. Wired remote switch. Compatible with a variety of computer systems,such as Windows, Linux, Mac, Unix, Ubuntu, Raspberry and most other major OS; also supports HDMI devices without USB signal input like DVR, NVR etc. LED indicate the active computer. KVM Switch Dual Monitor 4k 60hz: Our KVM supporting high resolution max up to 4K@60Hz, and also supports 3D and 1080P@60Hz or other lower resolution (Downward Compatible).supports separate audio and microphone output. Note: Only when both your computer Graphics card and monitor support 4K@60Hz then you can get 4K@60Hz effect, so if you want the max resolution you have to check your devices first. KVM Switches with 3 USB 3.0 Ports: Dual monitor HDMI USB switch with 3 USB 3.0 ports for sharing keyboard,mouse,printer,scaner and other USB devices.supports ultra-fast USB 3.0 data transfer up to 5Gbps,backward compatible with USB 2.0/1.1 devices.The upgraded design hides the messy cables at the back, leaving a USB 3.0 port on the front for inserting a USB flash drive.Unique design makes the desktop more tidy, Say goodbye to cluttered cables. Dual Monitor KVM Switch for 2 Computers: This dual monitor KVM Switch is for you to control them using one set of keyboard, mouse and single or dual monitors to make your work space tidy and efficient, also a premium choice for working from home. Only when your computer supports dual display or multi display, you can use this KVM to achieve 2 PC to share 2 monitors. (Extended, mirrored or spliced display modes depend on your computer's graphics card).