This sharing switch allows 1-2/4 computers to share an external device with USB interface such as a printer, scanner, plotter, Bluetooth device, etc. When multiple computers share an external device, the purchase cost of the office equipment can be greatly reduced, and more space is saved. This product will bring great convenience to your work, it is worth buying. Features: 1. With 2/4 USB ports, it enables 2/4 computers to share 1 USB compliant device such as Printer or Scanner. 2. It is convenient to switch, just press the relative button. No additional software. 3. Standard USB2.0 port, with fast data transfer, and backward compatible with USB1.1. 4. The adaptor is no need of external power. 5. Compatible with: for Windows 98/Me/2000/XP, for MAC/MAC 10 systems. Specification: Material: Iron Shell Color: Black Interface: USB2.0 Style: 2 Port, 4 Port (Optional) Size: 11.2 * 6.6 * 2.4cm / 4.4 * 2.6 * 0.9in Weight: approx. 137-158g Package List: 1 * Sharing Switch