Yes this is the same reciever that many others have for sale. I like them as they work great with my Spektrum radio, they are small and fit nicely on the back of the pilot and or in the harness.  I have modified them removing the bulky orange box and installed shrink tubing this way they are thin and mount very easy on the backs of the pilots

You can get it from me as a package deal, or order it from them:)  Whatever gets you in the air and flying..  I have had them work great with my Spektrum transmitters..

Yes the 6ch is cheaper then the 4 channel but the 4 channel is smaller, you choose what you like.

Includes:
-6ch Reciever in Shrink tubing
-binding plug