Utility transport version for the US Marine Corps.
A video of the aircraft in operation can be seen in this link (courtesy, Ian Abbott via Flickr).
VTOL type: Helicopter
Lift configuration: Single main rotor
Dedicated control device: Tail rotor
Crew required: 2
Crew seating: Side-by-side
Landing gear: Wheels (some retractable)
Total number of engines: 2