I just upgraded my transponder. I have a Stratus 2S for sale. It picks up all the traffic my new Garmin GTX 345 picks up, and sometimes finds the traffic sooner. I don't need both. It comes with the the window suction holder, nice carrying case, and wall charger. The internal cooling fan works great. On several occasions my iPad has overheated (Arizona based) in the shade while the Stratus just kicked on it's cooling fan in the direct sun. It has not let me down yet. I will sell it for $400.00.