Far Cry New Dawn has 10 MP3 Player Locations. Finding all of these Music Players unlocks the Audiophile trophy or achievement and completes the "Audiophile" Side Mission. They also add new soundtracks to your radio.

You can hear them when you get close enough. This is a type of collectible that can be revealed on your in-game map by upgrading the Cartography Station at Prosperity (your home base) and buying the map from there. They are available from the start of Act 1. None of them are missable, they can still be collected after the story. Some require the Grapple Perk so make sure you have that before you start.