1[6 in 1 Design] The adapter is designed with 3 USB 3.0 ports, 1 mini DP port, 1 High Definition Multimedia Interface 4K port and 1 storage card and 1 Micro stroage card reader. 2[High Definition] Connect a high definition laptop to a monitor, projector or LCD that gives you a mirror screen, High Definition Multimedia Interface resolution up to 4K / 2K at 30Hz. 3[Durable Lightweight Portable] The aluminum alloy shell design protects the interior well. UIltra small in size and light in weight, so you can easily put it in your pocket or laptop case. 4[Dual Hi Speed USB 3.0] Up to 5Gbps high speed data transmission, nearly 10 times faster than USB 2.0 (480Mbps) card reader, conforms to 2.0 / 1.1 compliant. 5[Widely Used] Can be used to flash disk, mouse, keyboard, TF / SDHC card, 4K monitor and HDTV, project all on a hub adapter with High Definition Multimedia Interface. Item Type: Expansion Dock Material: Aluminum Alloy Size: Approx. 9.5 x 4 x 1cm / 3.7 x 1.6 x 0.4in Color: Grey Parameters: 6 in 1surface Docking Stations, 3 x USB3.0, 1 x High Definition Multimedia Interface, 1 x Storage Card, 1 x Micro Storage Card Support video resolution: 4K/2K at 30Hz Applies to: For Windows, for OS X and for Android operating systems 1 xExpansion Dock