Usage Tips:Description: The hub uses plug and play design, which can be used easily and conveniently without driver and additional power. With 5-in-1 design, this USB hub can meet the multi-port expansion requirements. You can use it more assured as it has overcurrent/overload/short circuit protection. It is constructed of ABS material. The length of this product is 8.5cm, the width is 2.2cm and the height is 2cm. The hub has wide compatibility and is suitable for most USB devices, such as U disk, mouse, keyboard. Item Name: Hub Material: ABS Whether External Power Supply: No External Power Supply Number of Interfaces: 5-in-1 Interface: USB 2.0 Function: Support SD-Card, TF Card Reading Features: 5-in-1. High-speed Transmission, Plug and Play Size Details: 8.5cm x 2.2cm x 2cm/3.35" x 0.87" x 0.79"(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