Multiple USB ports for connecting with mouse， keyboard and USB flash drive Color: BlackSize: 5 x 2 x 3.2 cm Features: - Designed with 3 USB 2.0 ports- Conform with USB 2.0 spec - Support high speed data transfer- Support 180 degrees rotation Note: - Please make sure that the USB port of PC has sufficient power supply before using. - For desktop computers， please connect this hub to the back USB ports. Generally the power supply of front USB ports of desktops is not sufficient. - Please wait for a few seconds for plugging and recognizing new devices. If the devices cannot read， please disconnect with computer. When all the devices plugged， then connect the hub with computer again. 1 x USB hub