I bought the Motorola IHF 1000 "Premium Speech-Operated Car Kit with Blustooth Wireless Technology".
The only visible part of the unit is a small control panel about the size of one of those old, metal, zippo lighters. Five buttons;volume up, volume down, answer call, end call and "main menu" access button.
When I get within about 10 feet of the truck, the unit recognizes (bluetooth) my cell phone is ready to go. I push the main button and it "asks" me what I want to do. Dials by voice recognition and 20 saved numbers, by name. It is run through the Infinity sound system; mutes the "radio" for incoming and outgoing calls.
Great product.
$600 installed @ Car Toys.