Used for six months. I no longer need it because the two workplace PCs I used to have have been consolidated into one. I will also include the HDMI cables and other accessories if needed. The following is the official description: 【4 Signal Sources Share 1 Display Device】This kit allows you to easily control 4 signal sources with just one set of USB keyboard and mouse consoles, and switch between them at any time. It can be widely used in fields such as education, conferences, video surveillance, and security systems. 【Ultra HD 4K Visual Enjoyment】Supports a resolution of 4K X 2K @ 30Hz, making the image display more refined and realistic, and the colors brighter and more dynamic, pleasing to your eyes. Of course, it is also backward compatible with lower resolutions. 【USB Powered and Hotkey Switching】USB Powered: Means no power adapter is needed. Hotkey Switching: Apart from the method button switching, this kit also supports hotkey switching, allowing you to freely switch between 4 signal sources via the keyboard (Hotkey: Scroll Lock + Scroll Lock + 1 / 2 / 3 / 4)