This allows a computer to share 2 USB device such as printer, scanner, mouse, keyboard, card reader, flash drive and other USB devices. The USB 3.0 switch selector supports ultra-fast USB 3.0 data transfer and is backward with USB 2.0 and USB 1.1 devices. Save your time and increase efficiency. The USB 3.0 switch is suitable for a computer, sharing 2 USB 3.0 peripheral device. For example, two computers can easily share 1 printer. Good helper for work! with USB devices: keyboards, mice, USB printers, scanners,USB drives, card , etc. Can be used in various workplaces such as: control rooms, offices, libraries, schools. Small and portable, Easy to carry Lightweight and compact,it doesn't take up too much space and makes the computer desktop more tidy. type: allocator Interface: USB Colour:black Material:plastic Size:58 x 47 x 17mm Package Contents: 1 x Switch 2 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.