1.5-in-1 Aluminum USB C Hub, Expand Thunderbolt 3/Type C Port to 2 USB 3.0 Ports, TF/SD Card Reader, CF Card Reader. Note: Please carefully plug in the CF card, the pins for connection are dense and easy to bend, check before use and do not push directly with great force if you feel any resistance 2.2 USB 3.0 ports offer 5Gbps speed, convenient to connect keyboard and mouse. 3.cf card reader (TF/SD) provides 5Gbps transfer speed, enjoy high-speed data backup from camera, camcorder, etc. 4.No Driver Installation or Power Supply Required, Compatible with Windows, OS and Linux, Good Companion for MacBook Air/Pro 2020, iPad Pro, Chromebook and other laptops with Type-C port. 5. Allows phone and tablet to transfer data directly with USB flash disk or memory card, convenient and no laptop required. Note: OTG only works when your phone/tablet supports OTG