This is a nostalgic Showa-era entrance chime. It makes the "ding-dong" sound of those days. Although it's new and unused, I only tested its operation. Operation confirmed, no problems. It's been stored at home, so the box has scratches and dirt. In my opinion, the main unit is in good condition. I apologize if I missed anything. Please refer to the photos. Size (approx.): Width: 16 cm Height: 18 cm Thickness: 5.5 cm Switch size (approx.): Height: 6 cm Width: 3 cm Thickness: 3 cm Uses one D-cell battery (not included)