With 2/4 USB ports, this switch allows 2/4 computers to share a single USB device like a printer or scanner. Convenient switching – just press the corresponding button. No extra software needed. Standard USB 2.0 port for fast data transfer and backward compatibility with USB 1.1. No external power adapter required. Compatible with Windows 98/Me/2000/XP and MAC/MAC 10 systems. This sharing switch lets 1-2/4 computers share an external USB device such as a printer, scanner, plotter, or Bluetooth device. Reduce office equipment costs and save space by sharing one device between multiple computers. This product offers great convenience for your work and is a worthwhile purchase. Features: 1. Allows 2/4 computers to share 1 USB device like a printer or scanner. 2. Easy switching with a simple button press. No additional software required. 3. Standard USB 2.0 port for fast data transfer and backward compatibility with USB 1.1. 4. No external power needed. 5. Compatible with Windows 98/Me/2000/XP and MAC/MAC 10 systems. Specification: Material: Iron Shell Color: Black Interface: USB2.0 Style: 2 Ports, 4 Ports (Optional) Size: 11.2 * 6.6 * 2.4cm / 4.4 * 2.6 * 0.9in Weight: Approx. 137-158g Package List: 1 * Sharing Switch