The expansion dock is plug and play, which is convenient to use.The expansion dock adopts intelligent chip, which allows for high-speed and stable transmission.Made of aluminum alloy, the expansion dock is stainless and hard to use.The length of the expansion dock is 6.5cm, width is 1.6cm and thickness is 1.7cm. The cable length is 7.5cm.The expansion dock is compatible for Windows 10.8.7/Vista/XP and for Mac 10.4.6.Item Name: Expansion DockMaterial: Aluminum AlloyColor: Sea Blue Color, Silver ColorStyle: Type-C, USB(Optional)Interface Type: 1 x Type-C to USB3.1, 1 x USB2.0, 1 x USB3.0, 1 x Micro-SD Card Interface, 1 x TF Card InterfaceCable Length: 7.5cmPower Output: 5V/2AElectric Power: 10WUSB Downstream Current: 500mAUSB Transmission Speed: 5GbpsTF/SD-Card Transmission Speed: 18-20MbpsCompatibble System: for Windows 10.8.7/Vista/XP, for Mac 10.4.6Size Details: Expansion Dock: 6.5cm x 1.6cm x 1.7cm/2.56" x 0.63" x 0.67" (Approx.)Cable Length: 7.5cm/2.95" (Approx.)Notes:Due to the light and the screen setting difference, the item's color may slightly differs from the pictures.Please allow slight dimension difference due to the manual measurement.Package Includes:1 x Expansion Dock