The Sirius Jet has a "Hydrogen-Electric Ducted Fan Propulsion System" with the goal of providing zero-emissions flights.  There will be two models:

1. Business Jet: 3 passengers with a 1,150-mile range
2. Millenium Jet: 5 passengers with a 650-mile range

Both will cruise at speeds up to 323-MPH at a maximum altitude of 30,000 feet.