This item is a professional extension dock adapter. Made of , it is durable and practical for long time use. It is widely used for laptop and computers. Also, it is the great and for business, trade fair, advertising for your friends. Features - Color: Black - Material: ABS. - Size: 10.20X4.40X2.10cm/4.01X1.73X0.83 inch. - USB ports: 4. - Date transfer rate: Up to 5Gbps. - Accessing your media is easy with the hub and no drivers are required. - The item is made of , which is and reliable and can be used for a long time. - Support USB power supply mode and 5V power supply mode. - The product is a nice present for your friends and a good helper in your daily life. - Simple and high grade shell, high efficient heat dissipation, lightweight but sturdy, crush resistance and durable. Package list: 1 x 4-Port USB 3.0 Hub