?Packing List & Service?This KVM Switch kit comes with 1* 4X1 HDM KVM Switch, 4* 5ft KVM cables, 1* IR remote control, 1* DC 5V power adapter, 1* User manual. Plus, enjoy 1-year warranty. You can reach out to our customer experience design team if you have any questions or concerns. ?Convenient Hot Plug?Easy to set up. Plug and play, no software required. Easily add or remove devices without needing to power off the KVM switch or other connected devices, saving your time and hassle. Ideal for multi-tasking professionals and gamers who need to access multiple devices quickly and efficiently. ?Enjoy Immersive Sound?This KVM Switch comes with a 3.5mm Audio Jack port with a built-in DAC chip for stereo audio output that delivers high-quality sound to your connected headphones. You can inserted into a 3-segment 3.5mm earpiece device to the L/R port and enjoy crystal clear audio without any distortion or interference. ?Support USB 2.0 Peripheral Device?In addition to the keyboard and mouse dedicated ports, there is also a USB 2.0 port. You can share USB hub, USB drive, printer or scanner across multiple devices. Provide you with great flexibility in complicated computer environment. Note: It could not support hotkey switching when the keyboard connected to the USB 2.0 port. ?Wide OS Compatibility? TESmart KVM switch 4 computers supports various operating systems including Unix, Windows, Debian, Ubuntu, Fedora, Mac OS X, Raspbian, Ubuntu for Raspberry Pi and other Linux basic systems, making it a versatile selector for multiple devices to be used flexibly with different OS without the need for additional software or drivers. ?Switching Made Easy?Our KVM provides 4 switching options to suit your needs. Whether you prefer using the IR remote(AAA batteries not included), button, hotkeys, or mouse gesture, you can easily switch between HDMI sources and manage your devices with ease. ?Say Goodbye to the Annoying“Ding-Dong”?Keyboard and Mouse Seamless Switching, No delay, zero latency keyboard and mouse switching makes your use smooth and enhance your work efficiency or gaming experience. No more tangled wires or juggling multiple keyboards and mice. ?High Compatibility with Your Keyboards and Mice?The upgraded pass-through mode (Semi-DDM USB) of 4 In 1 Out KVM Switches makes it widely compatible with more keyboards and mice, including wired, wireless, mechanical, multimedia, and gaming K&M (Not support wireless bluetooth K&M). ?Ultra HD 4K@60Hz and EDID Emulators?The Resolution is up to 3840x2160 (4K) @60hz, 3440x1440@100hz, 2560x1440@144hz and downward compatible, Support 3D, HDR10, HDCP2.2, and Dolby Vision delivering more exquisite and authentic video on your screen. With EDID emulators in each input port, your computers always receive the correct display information and preventing displays setting change while switching inputs. Free you from the hassle of constantly adjusting display settings. ?HDMI KVM Switch 4 IN 1 OUT? HDMI KVM switch is perfect for hooking up 4 desktops or laptops to share 1 set of keyboard, mouse and 1 monitor for home and office setup, gaming consoles and streaming devices. Experience the convenience and efficiency of multi-device management.