Bidirectional switch, 2 in and 1 out or 1 in and 2 out. One computer can hold 2 USB flash drives without plugging or unplugging, and hardware switching is isolated to prevent USB flash drives from communicating with each other. The switch is a for sharing 2 USB devices between two systems, Perfect for sharing a printer or scanner in a small office environment. One-click switching, sharing mouse and keyboard. Plug and play, no driver required. Works without power supply and takes power from USB port. Supported systems: Applicable to Windows ME/98/XP/2000/7/8/10/Vista/MacOS 8.6 or above. type:A: 1 x USB Switch Switcher+2 x USB 3.0 data cable Colour:black Material:ABS Size: 45 x 55 x 22mm Package Contents: 1 x USB Switch Switcher 2 x USB 3.0 data cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.