I want to update this just incase anyone was interested in adding bluetooth audio in conjunction w pioneer bluetooth module for hands free calling. I purchased a usb bluetooth dongle off ebay for less than $5. Ran a 12v to usb converter for the dongle. From the bt dongle, is 3.5mm to rca into the z2 av1 input. My iphone 5s syncs with both devices, i still have hands free calling and bluetooth audio streaming to av1 input. Works great, only downside, there is no external controls on the headunit other than volume. I'm very happy with the mod.