Device comes with US map preloaded. To start using it, no subscription is necessary, but you might want to keep buying map updates. Device starts telling you that you map is over a year old – it is time to buy an update. You can install free internal software updates (firmware) through provided USB cable. When connected through USB cable (for charging for example), you can NOT use the device. You can see the content of you GPS unit as a hard drive on your PC. Device has a SD card slot to add more maps (like Europe – $50 -$100) or music (MP3), or photos, or books on tapes. According…