It is easy and convenient to use this expansion dock because it is plug and play. Featuring intelligent chip and high resolution, this expansion dock supports fast charging and HD-compatible image quality. It is constructed of alloy material. The length of this product is 114mm, width is 28mm and height is 11mm. This expansion dock is suitable for being used in computer, projector, TV set and so on. Item Name: Expansion Dock Material: Alloy Interface: PD Charging Port, 4K HDMI-compatible, SD-Card/TF Card, 2 x USB3.0 Features: Multifunctional, Fast Transmission, Lightweight Size Details: L: 114mm/4.49", W: 28mm/1.1", H: 11mm/0.43"(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 Expansion Dock