CY White Color USB-C Type C / USB 2.0 / Micro USB TF Micro SD & SD Card Reader for Cell Phone & MacBook & Laptop External storage expansion for Phone with USB 3.1 type-C port & Macbook & Laptop Built-in with a TF/sd card slot, you can expend your storage as you need. (128GB Max.) Data transfer rate: 480Mbps Manage all your data directly on your device;Games/music directly from your external device;Document reader for all common data formats USB-C Type C / USB 2.0 / Micro USB TF Micro SD & SD Card Reader