ELEGIANT 4 Ports USB Printer Share Sharing Switch Hub for PC Computer Manual Scanner Printer Mouse and Keyboard Cost-effective for small business and home to manage network layout. Making 4 computers access to one single USB compliant device. Button Switch, simple and convenient. No external power supply needed. Compatible with USB 1.1 and USB 2.0,Supports DOS, Windows 7, 8 Win3.X, Win95/98/98SE/2000/ME/XP, WinNT, Netware. Ideal for PC Computer Scanner Printer Projector Camera Flash Driver Mouse and Keyboard.