USB sharing four 

The four USB Sharing allows computers to share a desk 1-4 USB interface device， an external device to any USB port， such as printers， scanners， plotters， multifunction machines， Bluetooth devices and other 128 kinds of external devices USB port ， which can be reached by multiple computers to share a single purpose device， greatly reducing the cost of procurement of office equipment， but also saves more space. 

* Equipped with software that can automatically switch software switch， keyboard switch. 

* 4