What network sensor do I need?

Using Arduino Networking, Protocols, and Devices
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Hey there!
First of all I apologize for my English.

Right now I plan a little helicopter which controlled by remote controll. I need a communication way do transfer and receive data.
I have read that I need RF sensor. I have seen many different sensors. What Transmitter-receiver module do I need for long distance communication (some hundred of meters)?

Thank you!

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Continue to the previous topic: What network sensor do I need? - Networking, Protocols, and Devices - Arduino Forum

I have found this: http://www.bashmodulo.com/arduino/nrf24l01-radio-frequency-transmitter-receiver-on-arduino/
Does the NRF24L01 Radio is transmitter and receiver? Which means that I need to buy twice the same module?

If it does, is this one good?
http://www.ebay.com/itm/NRF24L01-2-4GHz-Digital-Radio-Link-with-High-Gain-Antenna-Module-for-Arduino-/131193700989?pt=LH_DefaultDomain_0&hash=item1e8bc1027d

Thank you guys!

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[or see them both in this topic - moderator]

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$10.99 looks like a good price. What's the buy-it-now cost?