Hi,
I had ordered WLtoys V911 4-Channel 2.4GHz Mini Gyro Single Radio Propeller RC Helicopter Kit (Model 2) online.
It has been imported into India and the Customs have asked to get a No-Objection-Certificate from the Wireless Planning Commision of Indian Govt.
I require to provide them technical details like :
1. Maximum out power of transmitter
2. Maximum Effective Radiated Power
3. Height of Antenna
Could you please help me get this info ?

There is lots of information already available in Forum
Please search under all Rc items custom discussion
You will know what to do and what's the best possible outcome

And about specification of the heli you need to ask seller or manufactuter for that

Typically under FCC and EU Regulation, the output of most ISM band Tx are limited to 1W. But for reason of easy Type approval, Interference to nearby transmitter on same band etc, the power of most 2.$ RC controllers are limited to 70-110mW.
But read the FCC spec/certificate of the exact model to be sure. Many cheap Chinese models use knock off RF Modules with bad filter design and pump as mush as 250mW to offer range.

Hi,
Appreciate all your suggestions. I understand "There is lots of information already available in Forum". However it is impossible for me to read thru each and every forum to find out the details that i need. I have been trying to search those details all thru so many weeks now. Could anyone please help me with the specific details that i need :
Could you please provide more details on the Transmitter for WLToys V911 :
1. Maximum out power of transmitter
2. Maximum Effective Radiated Power
3. Height of Antenna

You will not get specific answers - the best you can do is read the a7105 datasheet
and ask a EE friend/colleague to come up with some acceptable figures