It comes with two USB extension cables. If it works in two PC mode, one USB cable is connected to a PC for AI programs and the other connected to a PC for games. When it works in one PC mode, both of the USB cables should be connected to a same computer. A+ is twice as performant as version A. It supports keyboard and mouse and can work for two computers. It can also be used as a keyboard and mouse switcher. Note:The appearance of the cable color is random and cannot be specified, which will not affect the use. Colour:Transparent Material:Plastic Package Contents: 1 x Kmbox A+ Keyboard Mouse Controller 2 x USB Extention Cables 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.