Click for specs LCX-15

looks like "Custom Mapping

Optional MapCreate™ USA Topo Accessory Pack, FreedomMaps™, Fishing Hot Spots® Elite, and Navionics®"

so i think they come with the unit? but if you are getting it from your buddy he should have a chip in there already...just make sure you set it for "wid-west" or "north mid-west" i cant remember exactly because it's been 2-3 years since I have set one up...

A little warning, once you go to GPS navigation you can't go back to guessing and land marks...