TNP 4 Ports USB 2.0 Sharing Switch Box - Manual Share Switcher Adapter Adopter Splitter Hub Selector for PC Computer Scanner Printers Projector Camera and Keyboard with USB-A interface Support up to 4 pcs input, and 1 USB device output Button Switch, simple and convenient. No external power supply needed It 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 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 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