This USB switch box connects up to 4 computers to one USB device. It switches from one computer to another by push button in front. Vertical design requires very little desk space. To share a usb pheripheral like a usb camera, printer, keyboard, mouse, scanner, or modem. You will need one USB A-B cable from each computer\’s usb port to the switch box. And another A-B cable from your device to the switch. The USB switch box pictured has 4 B type connectors and 1 A type connector. If you need to connect two or more devices to one computer you will need a USB Hub. Comes with stand. USB 1.1/2.0 compatible. ¡E 4 USB B-Type correspond to computers and 1 USB A-Type hook-up to USB device. ¡E No redundant power required. ¡E Sharing application facilitates easy and secured switch from one computer to another. ¡E Switching icon displayed on the task bar indicates the device status.