PASBUY MT 4 Ports Printer Sharing Switch Hub Box For Printer Scanner Type A Male to Type B Male. USB 4-channel switch (4 TYPE-B connectors, 1 USB TYPE-A connector). All PC / MAC, Printers External Hard Drives and other USB Devices. The 4-port manual sharing switch box, allows 4 computers access to one single USB compliant device ( such as printer, scanner, external hard drive, projector, camera, keyboard with USB-A interface , each button to control each port. Compliant with USB 2.0 specification. Works with either USB 1.1 or 2.0 peripherals. Supports DOS, Windows 7, 8 Win3.X, Win95/98/98SE/2000/ME/XP, WinNT, Netware, Key press switch, easy and convenient. No external power supply needed.