IteliteDBS Range Extender Antenna - SHOCKWAVE DUO for DJI PHANTOM 4 PRO

I installed this item as I have dozens and my system kept disconnecting . I tryed to get support from main office and there isn't one . Kept getting numbers from office that were not valid and finally said I'm done just return it and now have to by a new controller. Very poor service and quality.

Much improvement over stock antenna. I also bought another for my Spark. You cannot go wrong for this price.