Main Unit: VE-E10-W ● Subunit: KX-FKD404-W Battery charging is working without any issues. I kept the main unit and subunit in communication for over an hour, but the battery level remained at 3, fully charged. The battery seems to be in good condition. Operation has been confirmed to be good. It can be used as an intercom within the building without connecting to an outside line. The charger and various cords necessary for use are included. I have enlarged the photos as much as possible, but it's difficult to see. There are small scratches on the screen. See photo 8. Please check the condition in the images. Thank you for your consideration.