USA SpecBT45-HON3 Bluetooth Phone, Music & AUX Input Kit for Select 2003-2014 Honda & Acura Models

will this work and 04 Acura tl w/navigation without loosing any controll and can i play my music using bluetooth and diplaying on the Navi screen?

What if I only want to stream audio. Can the hands-free phone capability be disabled?

Does the usb have power when the car is turned off? would be nice to charge a phone while the car is off.

When not on the aux mode playing music through the phone are you be able to use the bluetooth for phone calls if you were listening to the radio?