Not really a part info request more like a module so I hope it is alright for me to post.
Now I didn't quiet end getting a Kchibo KK939B but I did get a digital radio with a frequency counter built into it, seeing the radio was junk I extracted the counter but I must admit it has me confused...
The counter has 9 wires connected with 6 of them being six-strand rainbow wire while the other three are single wires…
The wires are marked as follows…
Single Black Wire marked A0
Single Red Wire marked F0
Single Red Wire marked F1
A tuning display isn't a pure frequency counter, it has to compensate for the IF offset, and in the case of an AM/FM radio, two different offsets. It's also pretty likely to be an integral part of the PLL tuning system?.