Using plug and play design, this hub is easy and convenient for you to use without driver and additional power. With transfer rate of 480Mbps, this hub has high-speed TF card reading and data transmission functions. It is constructed of aluminum alloy material. The length of this product is 9cm, the width is 1.5cm and the height is 0.7cm. And the cable length is 18cm. The hub is suitable for computer, mobile phone, laptop, etc. Item Name: Hub Material: Aluminum Alloy Cable Length: 18cm Transmission Rate: 480Mbps Whether External Power Supply: No External Power Supply Features: Multi-function, Fast Transfer, with TF Card Reader Size Details: Hub Size: 9cm x 1.5cm x 0.7cm/3.54" x 0.59" x 0.28"(Approx.) Cable Length: 18cm/7.09" (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 Hub