Someone installed this device furtively in my car, please help me to identify what kind of purpose for this device. I have taken two pictures of it as following:
=A1ifront side=A1j
=A1iback side=A1j
As you can see, there are three ICs on it. One chip is PIC16C56-XT/P and the other two chips are CA3240E. Please advise me some idea about the purpose of this design.
Best regards,
John Lee