brand new and high quality 4 Ports USB 2.0 Sharing Switcher is auto fit to you to make 4 computers access to one single USB compliant device such as Printer or Scanner. Convenient to switch, just press the relative button. No additional software. 4 USB ports, 4 in 1 out. No need of exteral power, because the USB port and the adaptor's internal can supply. 4 button switches for changing the USB signal control. Easy and Convenient to use Interface Type: USB 2.0. Color: Black. Size: 11x6.7x2.4cm/4.33x2.64x0.94inch Quantity: 1PC Note: Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1Pc x 4 In 1 Out USB Sharing Switch Box(not included USB cables)