Connect the red wire to power 12V+ and the black wire to 12V- 

and pair the bluetooth with your phone,

choose AUX from your radio panel,

You can play music in your phone through car speakers.

Fitting for following vehicles:

Mazda 6  2006 to up ONLY!!!

Mazda 3 2006 to up ONLY!!!

Mazda 5  2006 to up ONLY!!!

Mazda 2 2006 to up ONLY!!!

Mazda MX5 2006 to up ONLY!!!

Mazda RX8 2006 to up ONLY!!!

Cable length:15CM