2 COMPUTERS/LAPTOP TO 1 PRINTER AUTO SHARING SWITCH , ---This USB sharing switch is to share a USB device like printer, scanner, HDD storage, etc for 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. Product Feature: USB1.1/ USB2.0 Compatible 2/4 USB B-Type ports to computers 1 USB A-Type hook-up to USB device USB bus powered 2/4 LED indicators Support USB devices like printer, scanner, HDD storage, etc Auto switch on computer (need software installer) to share the USB devices among 4 computers Icon display on computer as device status monitors Window 2000/XP/Vista/Windows7 32bit/64bit / Windows 8 / Windows 10, OS supported Package Content: 1 X USB Auto Sharing switch ports 1 x CD driver / Software Installer 1 X User Manual