This automatic service unit works on R134a systems but has two independent oil circuits so can work with hybrid/electric as well as standard combustion vehicles. The AC788PRO has a database covering 4,000+ vehicles and also features an on-board printer. The company advises against bi-gas machines as they cannot meet OEM specs and VDA approval. Also, when one circuit is damaged the other becomes inoperable. Autoclimate says purchasing converted units is also a false economy as R134a work will be ongoing and once you convert, there's no turning back.