The Apple Thunderbolt 4 Pro Cable connects a Mac or iPad that has a Thunderbolt 4, Thunderbolt 3, or USB-C port to a display or external device.
Video
Use this cable to connect your Mac or iPad to a display that uses Thunderbolt 3 (USB-C) or USB-C for video, such as the Apple Studio Display, Apple Pro Display XDR, LG UltraFine 5K Display, or 23.7-inch LG UltraFine 4K Display. It supports DisplayPort High Bit Rate 3 (HBR3) video output.
Data transfer
Use this cable to connect your Mac or iPad to a device that uses Thunderbolt 4, Thunderbolt 3, or USB-C for data transfer, such as an external hard drive or dock. It supports Thunderbolt 4, Thunderbolt 3, and USB 4 data-transfer speeds up to 40Gbps and USB 3.1 Gen 2 data-transfer speeds up to 10Gbps. Check the specifications of your device to determine which data-transfer standard it supports.
Charging
This cable also connects to Thunderbolt 4, Thunderbolt 3, or USB-C devices for charging your Mac laptop computer or iPad. It delivers a maximum of 100W power to any connected device.
Compared with Apple USB-C Charge Cable
The Apple USB-C Charge Cable also supports charging, but data-transfer speed is limited to 480Mbps (USB 2.0) and it doesn't support video. The Apple Thunderbolt 4 Pro Cable has the Thunderbolt 
logo on the sleeve of each connector. Either cable can be used with the Apple USB-C Power Adapter.
Learn more
- Thunderbolt (USB-C) allows six devices in a chain, so you can use this cable between your Mac and each device in the chain.
- Adapters for connecting to the Thunderbolt 4, Thunderbolt 3, or USB-C port on your Mac.