Thunderbolt 3 provide 40Gbps Thunderbolt + USB 3.1 10 Gbps and Display 1.2 Build in 4K Video over USB TYPE-C Port

Thunderbolt 10 Gbps | Thunderbolt 2 20 Gbps

USB 3.1 gen 2 - 10 Gbps | USB 3.0 - 5 Gbps | Firewire 400 | Firewire 800