Whistler Intelli-Cord Radar Detector

If this item is supposed to auto mute the detector it doesn't work. I didn't receive any instructions with it so I'm shooting in the dark with it - literally - if you press the button too many times it shuts the unit off.

I ordered this thing along with my purchase of a Whistler Radar Detector, because it was advertised on Amazon as a smart companion purchase and I assumed that I needed to buy it separately. When the Radar Detector arrived, it included a power cord, so the Intelli-cord was not really necessary. Amazon needs to make it more clear what's included in the package with the primary product. Admittedly, it offers a quick on-off button that is not found on the standard power cord, but it's just not necessary.

I can't figure out how to make this cord do anything except turn the unit on and off. Since my detector is way out of reach I thought this cord would be crucial until I discovered a second power point in my car that switches off with the engine. Now it's really unnecessary. I wouldn't buy this again.