well after looking at garmin website it clearly shows that the chirp works with the fenix and even offers it as a accessorie, Oh and i called there tec surpport about the chirp and fenix, well like all of there units they have them ther for hands on and also had a few chirps ......i did what they advis me and still my chirp wouldnt let me program the chirp..... they said its prb a bad chirp so i order a new one and will update after i get it next week ......