The unit's power supply has been confirmed. Operational checks have also been performed, though not on everything. I connected one headphone and confirmed that sound was coming from both the left and right channels. Everything in the photos is included. I don't have detailed knowledge, so I can't offer a warranty. It shows signs of use. The case has many scratches. Please consider this a junk item. I am also listing this elsewhere, so please understand that I may remove the listing suddenly. Please understand that this is a used item before purchasing.