Hello
I have one at home and I can tell that it doesn't work as well as an antenna i made.
I don't know what it has inside but I consider that the other pole (negative) is missing to make it work a little better, that's why it has a wire connected.
I do not recommend it, better buy a GP126 antenna as it says RonR or make a DIY antenna.
I also used a flower pot antenna also made by me and it works very well.
Greetings
pd. Image1 - AirNAV antenna, Image2 - DIY 1/4 wave antenna, Image3 - DiY 1/4 wave zoom, Image4 - DIY FlowePot Antenna