USB hub all-aluminum body. Fine craftsmanship, Rugged metal housing protects against breakage and is more durable than plastic. Fast data transfer, 1 Port USB 3.0 Hub, 3 Port USB 2.0, Transmission of data without waiting, fast and efficient. USB charger can charge four phones at the same time, USB Hub Extensions very powerful. Mini portable and easy to carry, Keep your desk clean.More enjoyable work and play Hub Extensions meet the multi-port expansion requirements of the device.Charging, USB flash drive, mouse, keyboard.