This is a used item. The set includes the main unit, remote control, earphones, instruction manual, and box. Gum batteries are not included. I was able to confirm its operation with a separate battery case a few years ago, but I haven't checked its operation recently, so please consider it as junk. There are no noticeable stains overall, but there are traces of battery leakage in the gum battery compartment. Thank you. (o^^o)