?Stable Operation? The KVM switch is equipped with a 12V external power adapter, eliminating the need to draw current from the USB port of the computer's host computer (the host computer provides less current to support USB devices such as hard disks and cameras). In addition, we offer return and exchange service if the device is abnormal within the 12-month usage period. If you have any questions, please feel free to contact us. ?Dual Monitor KVM Switch?HDMI KVM Switch 2 in 2 out, support panel button and external cable control switching, one key to switch two signal sources. Note: This dual-monitor KVM switch requires your computer to have dual graphics cards (2 HDMI output ports) and support duplicate and expansion modes. Note: Keyboard shortcuts (hotkeys) are not supported for switching. ?HDMI KVM USB 3.0 Switch?In addition to two HDMI ports, this KVM switch has four USB 3.0 ports with data transfer rates up to 5Gbp/s. It is compatible with USB 2.0 devices. It can be used to share USB devices such as printers, scanners, wired or wireless keyboards and mice. Use of high power USB devices requires the use of the included 12V power supply. Cross-platform support for most major operating systems, such as Windows, Linux, Mac, and Linux. ?Support 8K Resolution?This HDMI USB KVM switch supports up to 8K@60Hz, which can make the image display more exquisite and realistic, and the colors are more bright and moving, which is really a feast for your eyes. If you want to get the best results, please make sure your input device, HDMI cable and output device all support 8K@60Hz. ?KVM Switch Dual Monitor 2 In 2 Out? This dual monitor KVM switch allows you to control 2 computers using one set of keyboard and mouse, sharing 4 USB3.0 devices and 2 monitors, and supports duplicate mode and extended mode (requires your computer to have 2 HDMI ports). Duplicate Mode: both computers display the same screen, Extended Mode: both computers display different screens.