Welcome to our store! This sharing switch allows 1-2/4 computers to share an external device with a USB interface, such as a printer, scanner, plotter, Bluetooth device, etc. When multiple computers share an external device, the purchase cost of office equipment can be greatly reduced and more space can be saved. This product will bring great convenience to your work, it is worth buying. Features: 1. With 2/4 USB ports, it allows 2/4 computers to share 1 USB-compatible device such as a 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 adapter does not need 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 ports, 4 ports (optional) Size: 11.2 * 6.6 * 2.4 cm / 4.4 * 2.6 * 0.9 inches Weight: Approx. 137-158g Package list: 1 * Sharing switch 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the item, such as damage and incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.