PUMPKIN CAR STEREO SUPPORT CENTER

I'm hearing an odd clicking sound when listening to my AM stations.
Listen here ----> https://www.dropbox.com/s/im89lvdehqqgieg/kfgo.wav?dl=0

The clicking does not change with engine RPM's, and does not change if the engine is on or off.
I did not hear this with the factory radio, and prior to this Pumpkin unit, I had a Ca-Fi Dashlinq and it wasn't present in that either.

It is more noticeable when I'm listening to a weaker station.

If someone has any suggestions, I'm all ears, but what I'm really wondering is if others are seeing this as well. I just don't want to be chasing something that is common with the design of these units.

This is the unit I purchased...

Hi there
Really sorry for replying you late, cause I was ill and rest in hospital where there is no internet for right ear surgery, and my colleague forget to reply you here, hope you can understand!
That is really odd issue, does this happen in FM radio?
Best Regards!