?Stable Working?The KVM Switch is equipped with a 12V external power adapter, which eliminates the need to draw current from the USB port of the computer host (the host provides less current to support USB devices such as hard drives and webcams). If you encounter any problems during use, you can contact us, and our professional engineers will contact you within 12 hours. In addition, if the device experiences abnormalities within 12 months of use, we will provide a return and exchange service. ?Support One-Touch Switching?Kvm switch has one-touch switching button, no driver needed, just plug and play, one-touch switching between 2 computers and sharing 4 USB3.0 devices. When the KVM switch is connected to which signal source, the LED indicator will show which port is active. Note: Keyboard shortcuts (hotkeys) are not supported for switching. ?USB 3.0 KVM Switch?The KVM switch is equipped with 4 USB 3.0 ports with a transfer rate of up to 5Gbps, which can be connected to peripherals such as mouse, keyboard, printer, webcam and USB flash drive, and is backward compatible with USB 2.0, 1.1 and 1.0. ?Support 4K Resolution?This HDMI USB KVM Switch supports up to 4K@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 the eyes. If you want to get the best results, please make sure your input device, HDMI cable and output device all support 4K@60Hz. ?KVM Switch 2 Input 1 Output?This KVM Switch 1 monitor 2 computers, support sharing a set of mouse keyboard printer, one key fast switching, improve office efficiency and gaming experience.