Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: exactly what does this product do?
Document: Works exactly as stated and it's very tiny so it's easy to hide worth the money I would buy it again
Does exactly what it says with no additional switch needed. Easy to install with your aftermarket wiring harness. Great buy.
worked perfect, exactly as described. Very easy to install. directions were very straight forward. Installed on a pioneer AVH- X3500BHS
this little thing works exactly as directed small simple and easy... just don't get caught using it... dont say i didn't warn you
This product looks cheap and probably is, but it works and is easy to install. I would recommend to a friend.
This product works just perfectly as advertised!!! It was easy to install also. I highly recommend this product to anyone.
Works with no issues and very easy to install. The product is very small, easy to hide. For radios using app mode, this is a must have.
Connected this product as per directions, works perfectly as advertised, was simple to install, I recommend this product. Microbypass rules!
The bypass does exactly what it is supposed to. Directions are a little simple so if you have no experience with wiring you may get confused but it is pretty simple. It is not interchangeable with other brands of radios though.
Great product. Just what I was looking for. Great for price. Sounds great. Looks great. User friendly. I would recommend to anyone.
Answer: This is a damn scam. Just ground the green "Parking brake" wire to the radio chassis and problem solved. It has been the same way for years now.