Sanwa Supply PC Switcher for Keyboard and Mouse (21) SW-KM2UU

You can switch between two computers using one set of USB keyboard and USB mouse. Switching is as simple as pressing the computer hotkey (Ctrl or Scroll Lock) twice. You can instantly switch to another computer. Since the keyboard port is emulated, you can immediately operate the keyboard after switching. It is possible to start two connected computers at the same time. Complete startup is possible without switching ports when rebooting. The USB port for the mouse has a pass-through structure, making it possible to use a tilt wheel function and a multi-function mouse. You don't need to install any software; you can switch between them just by connecting them. It operates by supplying power from the computer's USB port, so no AC adapter is required. *Keyboards with N-key rollover function such as gaming keyboards are not supported.