This is an 8-port Docking Station / USB Hub for use with MacBook Pro and other devices equipped with A USB-C port. It provides for powering your MacBook as well as providing you with 3 USB ports, an Ethernet socket, an HDMI output for video, and SD-Card and Micro-SD Card slots. This device certainly makes your computer more usable. We are thrilled with this purchase. Well worth the price.
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