This Type-C Extension Cable supports PD 100W quick charge, transmitting rate up to 20Gbps and syncing output audio and video with resolution up to 4K. But another connecting cable should also also supports the same function or better so as to fully achieve the function of this extension cable. Besides, this cable is Compatible with Thunderbolt3 external hard disk. Specification: Quick Charge It supports PD 100W quick charge, shortening time of charging device. High-speed Transmission With USB 3.1, you can enjoy high transmitting speed up to 20Gbps(theoretically), shortening time of transmitting files. Wonderful Visual Effect It supports syncing output audio and video with resolution up to 3840* 2160. Wide Compatibility The type-C male interface is compatible with laptop, desktop, phone and tablet while female one is compatible with devices with type-C interface like external hard disk, card reader, headset, U disk, hub, etc. Plug N Play No drivers required, easy to use. Note: Another connecting cable should also supports the same function or better so as to fully achieve the function of this extension cable. Specification: Color: Black Cable length: 0.3, 0.6 (Optional) Transmitting rate: Up to 20Gbps Resolution: Up to 4K Packing list: 1 * Type-C Male to Type-C Female Cable