With this Apple Thunderbolt 3 Cable 0.8 meters, you can connect peripherals such as hard drives, docks, or screens to your iMac or MacBook. This cable supports speeds of 40Gb/s via Thunderbolt 3 and 10Gb/s via USB 3.1. That means you can share large files between different devices very fast. This cable also supports DisplayPort video output (HBR3) and power supply up to 100 watts.