Sanwa Supply PC Automatic Switching Device (4:1) SW-KVM4LUN2 Brand new, unopened. I kept this at home as a spare, but I don't seem to have a chance to use it, so I'm selling it to declutter. Please note that there may be scratches and dents on the outer box due to storage. You can switch and use 4 computers with one set of USB keyboard, USB mouse, and display. You can easily switch between the 4 computers by pressing the [Ctrl] key twice, or [ScrLock] twice + [1-4]. You can also switch using the button on the front of the main unit, and you can visually check the switching status with the LED. You can switch consoles while the connected computers are powered on. Because the keyboard port is emulated, it can be fully booted without switching ports during reboot.