For sale is my Horus 12s by FrSky. This transmitter is like new and there isn't a scratch on it. I have converted it to the Open TC operating system which makes this radio one of the most powerful systems on the market.
The 12s is the Flagship transmitter in the FrSky arsenal. There are too many features to list them all here but a quick search on the FrSky website will provide the answers to all your technical questions.