Usb-c hub (6-in-1): extend one 4K UHD HDMI port, two Supper speed USB 3.0 Ports, one SD Memory Card slot and one TF memory card slot from one USB-C/Thunderbolt 3/ Type C port and charged your laptop at the same time by the USB-C power pass-through port | 4K video USB-C to HDMI Adapter: mirror or extend your screen with USB C hub HDMI port and directly stream 4K UHD @ 30Hz or full HD 1080P video to HDTV, monitor or projector | Super speed USB 3.0 ports(at full-speed): allow you to connect keyboard, Mouse, hard drive, etc to MacBook Pro, up to 5Gbps data transmission speed, down compatible with USB A 2.0 and below. Because HDD/SDD needs more power, so this adapter only allow connect 1 HDD/SSD and this adapter won't support Apple USB Super drive. | Convenient USB-C to card reader for USB-C/Type-C/Thunderbolt 3 devices to access files from SD/TF card reader, perfect for photographer or designer, etc | Aluminiun case design(space Gray), perfect for new laptops with USB-C port, such as 2017 MacBook Pro, 2015/2016 retain 12 inch MacBook, Dell XPS 13, HP spetre x2, etc. This adapter only support USB-C devices with DP Alt Mode and it won't support MHL mode devices. Please check the compatible list for regular devices before purchase this product. Welcome to ask any questions If you are not sure whether your device is with DP Alt Mode.