Sanoxy 2 Ports USB 2.0 Auto Sharing Switch HUB Selector Switcher for Printer Scanner Sanoxy USB sharing switch is to share a USB device like printer, scanner, HDD storage, etc for two computers via USB connections. And you can shift via hot key (Ctrl+F11) from one computer to another to use the external USB devices. It’s USB powered and no external power adapter is needed. Specifications: USB1.1/2.0 Compatible 2 USB B-Type ports to computers 1 USB A-Type hook-up to USB device USB bus powered 2 LED indicators Support USB devices like printer, scanner, HDD storage, etc. Auto switch on computer to share the USB devices among two computers Icon display on computer as device status monitors Window 2000/xp/Vista/Windows7 32bit, MAC OS supported Note : Connect one end of a printer cable (named Cable1, length: 5m) to a printer while the other end plug into the USB port of the Sharing Swicth, whose other end has two USB ports named PC1, PC2, which can be connected to the two PCs with two USB A to B printer cables (Cable2 & Cable3, length: 5m). Then PC1 and PC2 can share one printer. But now the total working cable length is Cable1+Cable2 (or Cable2+Cable3). Which means 10m! It is well known that the transmission signal will become weaker and weaker as the cable becomes longer and longer. So it is vital to choose printer cable with high quality.