This USB Switch 4 Port device allows up to 2 users to share 4 USB 3.0 peripheral devices, such as a printer, scanner, mouse, keyboard, USB disk, etc without the need to constantly swap cables or set up complicated network sharing software. It's great for use at home if you have multiple PCs or Macs. USB 3.0 Switch supports ultra-fast USB 3.0 data transfer rates of up to 5Gb/s (10 times faster than USB 2.0), to work flawlessly with high-bandwidth USB 3.0 devices, such as external hard disks, high-resolution webcams, camcorders, video surveillance cameras, digital video cameras, multi-channel audio and more, and is backward compatible with USB 2.0 and USB 1.1 devices. This USB 3.0 switch is plug-n-play compatible, with no additional driver installation needed.USB bus-powered - No power adapter required. This switch requires manual control to select the active computer port; it does not 'automatically' switch between ports. Use the provided 1.5M cables to connect the USB switch to your computers and to keep the USB cable that connects your peripheral to the USB switch under 6ft/1.8m. Please use Standard DC 5V USB Power Adapter(Not Included in the package, sold separately). Any charger with higher voltage output is NOT allowed and may affect the product performance. 2.4Ghz wireless devices, such as wifi, wireless keyboard, and mouse adapters, may not work stable near USB 3.0 devices or hubs. Try using the host port or a USB 2.0 connection.