I've been searching high and low on the web, and can't find what Bluetooth profile this H/U is.
From what I gather, Bluetooth 3.0 has a higher bandwidth capability, resulting in higher audio quality. The only thing I can find out is that the Z130 supports A2DP, which doesn't really tell us anything about which Bluetooth profile is being used.
I have the z130BT and I can tell you the bluetooth audio quality is pretty good ... I have 320k MP3s on my iPhone and I cannot really tell the difference between songs played from the iPhone and from the SD card in the head unit.
If you look at the firmware upgrades you will also see Bluetooth driver versions 3.x ... not sure if that means Bluetooth V3 protocol or not.
I've been searching high and low on the web, and can't find what Bluetooth profile this H/U is.
From what I gather, Bluetooth 3.0 has a higher bandwidth capability, resulting in higher audio quality. The only thing I can find out is that the Z130 supports A2DP, which doesn't really tell us anything about which Bluetooth profile is being used.
It's in the back of the User's manual. Bluetooth 2.0+EDR.
... and it looks like v2 should give you plenty of bandwidth to play MP3s and even WAV file if the player supports it (I wouldn't know).