I just upgraded from my 2-month old 700w to a new 700wx (a mere $50 upgrade fee). I didn't take the charger, headset, etc. as they are the same phone so I just kept my original items. I also didn't take the Owner's Manual as I could just download it. In the settings on the 700wx there is a "THB kit" item with the icon of a car so I assume this is a hands-free car kit. If I do a search there is a company called Bury and THB is their product that Palm has licensed,
http://palm.com/carkit. I don't see this covered in the Owner's Manual at all or any info anywhere though I don't know that it takes a lot of brain power to figure out the settings. I wonder what else I'll notice on the 700wx that is not mentioned in the Manual.