April 18, 2008 08:33
I'll second jade's suggestion. Make sure you get a 42 rather than a 41, the 41 is not programable. I have a Bluetooth unit which occasionally drops the BT connection, not sure why but I suspect it's a result of other BT devices being introduced to the environment. The other advantage to the USB device is the ability to keep it powered (via USB) if it's 12v source happens to go down.