?2 Years warranty?Package: 1*4 port KVM switcher, 4*5ft(1.5m)HDMI cable, 4*USB 2.0 cable, 1*USB C charging cable, 1*desptop controller, 1*user manual. Any problem, pls feel free to contact us. MT-VIKI provide lifetime technical support. just plug it in, no driver software is needed. When using this product, please connect all the cables. ?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 4 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. ?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. ?One-Key Switch & Desktop Controller?2 switching ways for this kvm switch 4 port: 1.Press the button on the top, LED indicator of the corresponding port will light up; 2. an extended desktop selector is included, easily switch between 4 inputs. ✓?UHD 4K@60Hz HDMI Signal Display?This HDMI USB KVM switch supports resolution 4096x2160@60Hz, 3840x2160@60Hz, backward compatible, YUV 4:4:4. Clear and smooth video graphics are good for your work and entertainment. ?KVM Switch 4 Port HDMI?This 4 Port KVM Switch can control 4 PCs to share 1 monitor with 1 set of keyboard and mouse. You can quickly switch between four computers by simply pressing the switch button or wire-desktop controller. It can be widely used in education, studio, office, and other fields. Please Note: This product does NOT support hotkey switching.