What are the features of VVIP aircraft 'Air India One' that arrived in India today?

A modified Boeing 777 aircraft part of the 'Air India One' fleet to be exclusively used by the Prime Minister, President and Vice President landed in Delhi today. The plane is equipped with a laser-based missile defence system and configured to provide office space, meeting rooms and advanced communication systems. It can also fly over 17 hours continuously without refuelling.