SPECIFICATIONS: USB Type-C is the new USB-IF standard that solves several challenges faced by today’s Type-A and Type-B cables and connectors. This product can expand your computer’s connectivity and functionality with the USB 3.0 hub for ultimate flexibility. Widely used for external storage devices, computer power source adapter, card reader, 4K displays at 30Hz refresh rate, USB 3.0 HUB and so on. Port: Get all the essential ports you need. 1*USB-C Port(connect PC to support the device power) 1 *4K displays at 30Hz refresh rate 1*USB-C to PC port (supports PC charging) 1*USB 3.0 port 1*SD/SDHC card reader 1*Micro SD card reader Details: If the Macbook add this product will be supports all your devices for work+play. it also charges your laptop. plug your power cord into the second USB-C port. the small footprint saves desk space and the sleek design matches your laptop.