It is easy and convenient to use this expansion dock because it is plug and play and driver-free. Stable and high-speed data transmission of this expansion dock is supported by its intelligent chip. It is made of high-quality aluminum alloy, ABS and copper material. The aluminum alloy shell supports efficient heat dissipation, which will not cause damage to your computer. The length of this product is 7.2cm, the width is 4.5cm and the height is 1.4cm. This expansion dock is compatible for computer. Item Name: Docking Station Material: Aluminum Alloy, ABS, Copper Interface: USB3.0, USB2.0, SD-Card, TF Card, RJ45 USB 1 x USB3.0, 1 x USB2.0 Power Output: 5V-20V Current: 3A-5A Power: 15W to 100W Power Input: 5V/1.5A USB3.0 Transmission Speed: 5Gbps USB2.0 Transmission Speed: 480Mbps Features: Multifunctional, Fast Transmission, Lightweight Size Details: L: 7.2cm/2.83", W: 4.5cm/1.77", H: 1.4cm/0.55"(Approx.) Cable Length: 13.5cm/5.31" (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