Best Solution For Expansion Need. Usb3.0 Provides Super Speed Data Transfer Rate Up To 5Gbps. Plug And Play, Without Complicated Driver Installation. Compatible With Usb2.0 / 1.1. With An Optional Power Port (Micro Usb). By Connecting To External Power Supply, It Can Supply Power To Peripheral Devices. Designed And Manufactured With Bc1.2 Charging Technology.