One button exchange between 2 computers. Convenient and efficient, 2 computers share 4 USB devices, plug and play. Devices such as HDDs and digital video cameras may require an external power supply to operate. When using high-power equipment, make sure to use a standard 5-volt adapter for power supply. Strong compatibility. Plug and play, suitable for 10/8.1/7/Vista/XP and , Linux and Chrome OS. The LED status indicator accurately shows which computer is controlled. size: 99x50x14mm Material:ABS+metal colour:Black Package Contents: 1 x KVM Switch 2 x USB Cable Only the above package content, other products are not included. Note: Light 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.