CAN FD is a faster, more reliable and more secure protocol. The Autel CAN FD Adapter connects to compatible VCIs to enable the tablet to communicate via the CAN FD communications protocol and diagnose the vehicle. Vehicles currently using this faster CAN FD (CAN Flexible Data-Rate) protocol currently include many GM and Ford 2019 and 2020 vehicles. Compatible with the MX808, MS905, MS906, MS906BT, MS906TS, MS908, MS908S, MS908P, MS908SP, MSELITE, IM508, IM608. The CAN FD Adapter is not required for Ultra, MS919 or MS909.