I don't know whether we are talking about the same device here, but this is the one that is available over here. Looks interesting, I am thinking of buying one..
Take a look : Flipkart :Robomart DJI Phantom Quadcopter
There it says 300 metres.
Its an entire series of products but the one brought down had a 2 km range. I think its this one: Buy Phantom 3 Professional | DJI Store