As it's name suggests, this 0.8 m Thunderbolt 3 USB-C Cable is a. 8-meter cable supports Thunderbolt 3 data transfer up to 40 Gbps, USB 3.1 Gen 2 data transfer up to 10 Gbps, DisplayPort video output (HBR3), and charging up to 100W. Use this cable to connect a Mac with Thunderbolt 3 (USB-C) to Thunderbolt 3 devices such as docks, hard drives, and displays. You can daisy-chain up to six Thunderbolt 3 devices.