This is the Android->PARIS AIR adapter/cable - it looks like a regular cable but it's different internally - so DON'T connect it backward - make sure the short cable goes to the phone side !! - once connected it is easy to make PID changes - just land and disarm then alter the GUI settings via your Android Cell phone App (app sold separately) on your Android Phone - no need for any bluetooth. Perfect for PID tuning.
Works with Android 4.0 or later Phones which have OTG (check your cell phone to see if it has OTG - use google) using the App Multiwii EZ-GUI from eziosoft is here for MWii 2.3
sadly It does not work with Apple iPhone