12 months warranty: Only when your computer supports dual display or multi display, you can use this KVM to achieve two computers to share two monitors, extended mode or copy mode.(Depends on your computer's graphics card). If your computer only supports single display, then this dual monitor kvm switch cannot help you get dual display function. Tips: If you have any questions about the product, please contact us. 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 DP devices without USB signal input like DVR, NVR etc. Monitor Switcher With 3 USB 2.0 Ports: Plug and play with no driver needed, with extra USB 2.0 port for sharing USB printers, scanners and jump drives, wireless and gaming keyboard mouse. The upgraded design hides the messy cables at the back, leaving a USB 2.0 port on the front for inserting a USB flash drive.Unique design makes the desktop more tidy, Say goodbye to cluttered cables. Also supports separate audio and microphone output. KVM Switch Dual Monitor Displayport 4K@60hz Visual Enjoyment: This small & exquisite kit supporting high resolution max up to 4K@60Hz, and also supports 3D and 1080P@60Hz or other lower resolution (Downward Compatible). Complies with the DP 1.2 standard. 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. Dual Monitor KVM Switch Displayport: The dual monitor kvm using only 1 set of keyboard, mouse and 2 monitors to control 2 DisplayPort computers/laptops, Support up to 4K@60Hz for extended,mirrored or spliced display(Depends on your computer's graphics card). Make your work space tidy and efficient, also a premium choice for working from home.