The use of plug and play design enables this hub to be used easily and conveniently without driver and additional power. With 3-in-1 design, this USB hub can meet the multi-port expansion requirements. You can use it more assured as it has good heat dissipation. It is constructed of aluminum alloy material. The length of this product is 7.96cm, the width is 1.45cm and the height is 0.73cm. The hub has wide compatibility and is suitable for most USB devices, such as U disk, mouse, keyboard. Item Name: Docking Station Material: Aluminum Alloy Transfer Rate: 5GB Number of Interfaces: USB2.0/USB3.0 Cable Length: None Whether External Power Supply: No External Power Supply Features: 3 in 1, High Speed, Good Heat Dissipation Size Details: 7.96cm x 1.45cm x 0.73cm/3.13" x 0.57" x 0.29"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Docking Station