?After-sales Service?This KVM Switch is equipped with 2 USB-B cables. You need to prepare the 3 HDMI cables required to connect 2 computers and 1 monitor. Our products provide lifetime warranty service. If you have any questions or concerns about our products, please contact us directly through the order number. We will provide you with a solution. ?HDMI KVM Switch Support Adaptive EDID & Plug and Play?This HDMI KVM Switch can adaptive to EDID, which makes image transmission more stable and more smoothly. Support HDMI 2.0, HDCP2.2 standards. This KVM Switch 2 computers 1 monitor can be easily to install, just plug it in, no driver software is needed. When using this product, please connect all the cables. ?Support Ultra HD 4K Resolution?This KVM Switch 1 monitor 2 computer can support the resolution up to 3840*2160@60Hz, and can also be backward compatible with 3840*2160@30Hz, 1920*1080P@60Hz etc., which will bring you ultra-high-definition visual senses. The 4K KVM Switch can support a maximum refresh rate of 60Hz, please pay attention to the setting of this parameter when you use it. ?KVM Switch HDMI with 4 USB 2.0 Ports?This HDMI KVM Switch comes with 4 USB 2.0 ports for sharing USB devices, such as keybaord, mouse, scanners, printers, U disks and more other USB devices, automatically recognize and match various display devices. This KVM Switches also supports a variety of input devices, such as PC, Laptop, PS4, etc. Compatible with a variety of computer systems like Windows 7/8/10/Vista/xp, Linux, Mac, and so on. ?KVM Switch 2 Port HDMI?This 2 Port KVM Switch can control 2 PCs to share 1 monitor with 1 set of keyboard and mouse. You can quickly switch between two computers by simply pressing the switch button (2-5 seconds). It can be widely used in education, studio, office, and other fields. Please Note: This product does not support hotkey switching.