It comes thru the speakers. Just turn on the media player if you have music on the SD card and play what you wish. when you get directions it will cut off the music and give you directions and then it will go back to your music. Priority is Phone if you get a call> Directions > Music MP3 files only. It will play nothing else but MP3 format which is the most popular. You may have to turn it on Aux to get what you want not radio. It is pretty easy once you paly with it. The 590 is much better than the 660 which they went back to in 2016. Most OEM companies have abandoned the 660 due to it's age. Garmin very rarely supports a unit over 10 years old. Make sure you go to My Garmin and open your free account and register your unit and make sure you update the software and maps often. You should be more concerned with software updates rather than map updates as the map updates usually only updates the Points of interest.
Go to this website called the Zumo Forums and learn all about it. I am Azone on the forums with over 3000 posts but there are many good people with allot of good info on all Zumos.
http://www.zumoforums.com/
To update the 590 (Can Am)
http://can-am.brp.com/spyder/owners/dealer-database-update/garmin-zumo-590.html
To update the Can Am dealers go here
http://can-am.brp.com/spyder/owners/dealer-database-update.html
You will have to use the USB cord to hook up to your PC and then you can see your Zumo in the removable drives as Garmin etc. From there you can also see your SD card and add songs or update maps using My Garmin
https://my.garmin.com/mygarmin/logi...min.com/mygarmin/customers/myGarminHome.faces