We setup app to provide sound through the rental cars aux (car not equipped with Bluetooth but that wouldve worked too) feature and we were so happy to have a guide that didnt need to be tipped and didnt take us to places we didnt want to go to AND she even told us of tourist traps and advised when better photo opportunities were available if we were short on time. It is well worth the $7.95 fee. Have a great trip.