The phone comes with a fast charger for plug-in charging, its battery, and an earpiece.
The earpiece system is a good one. The phone has built-in noise cancellation/reduction and a disconnect button on the cord.
I recommend getting a phone case (I have a Motimo leather wallet case and a water resistant Supcase, and like them both). I also recommend getting the Zagg InvisibleShield Glass screen protector. It is glass and performs great. It also feels much better than the plastic screen protectors. Be aware, however, that the S-pen may cause faint scratches on the screen protector. The other option you might consider is a micro SD card for additional storage.