Description: You're an energy-conscious computer user who cares as much about your bills as you do about convenience. If you're looking to expand the utility of your computer or laptop's USB port in an energy-efficient way, then you need a powered USB 3.0 hub. Featuring four ports, each with its own on/off switch, you can easily control what devices are drawing power from your computer's USB port while expanding the number of USB ports available. Backwards compatible with any version of USB data transfer, this power-strip style USB 3.0 hub is the ideal accessory for any computer or laptop owner. This product can support 5V 1A external power supply. Power cable Not included. What's in the box 1 x 4-Port SuperSpeed USB 3.0 Hub with Individual On/Off Switches