[Joe Bob]

I checked the website, looks like the CK3100. Bought it at least 4 years ago when CA banned to the ear cell phone usage. It works fine. When in low bars areas, it is less connective than the handset.

Uses Bluetooth and your phone needs to support it obviously. Should be a good call as the model has been out a bit. My stereo guy got it for me. Supports four different phones but not ALL at once. It works thru the GM stereo. I used the stand alone ones and they suck. This one works as well as the factory ON STAR.

I installed a stereo that had one built in, in my cabriolet.....engine and wind noise kills it. I needed a new set of tunes anyways and it came with it.....no extra cost.