The ALOGIC Ultra Dock Nano is designed to make the most of the USB-C ports on your Macbook Pro and Macbook Air. In its 2nd generation, the dock nano features a unibody aluminum and soft touch ABS construction. This dock features a HDMI (4K@30Hz) output for connecting an external display, a SD and Micro SD card reader for quickly transferring photos and videos, and a dual-port USB hub for other peripherals, two USB-C Ports where one of the USB-C ports is enabled with PD 3.0 specifications and will allow charging of the laptop with up to 100W power and data transfer at the same time, the other USB-C port supports USB 3.1 Data speeds.