Easily share a USB (Universal Serial Bus) device among up to 4 computers without having to keep unplugging & plugging. The 4 inputs require common USB (Universal Serial Bus) cables (not included) to connect the PCs the USB (Universal Serial Bus) device (e.g., scanner, webcam) is connected to the output. Purchasing a USB (Universal Serial Bus) hub means that you can use several USB (Universal Serial Bus) devices via the switch. LED indicators conveniently display the current switcher status.