Some items were purchased overseas. There's a place on the back to insert batteries. I think the gray one makes sounds? The dark gray one lights up in the back? The batteries have already been removed, and the operation has not been confirmed. Both are made of metal and have weight to them. There are traces of sticker removal on the back. ---- The AI's explanation is below; I'm not sure if it's correct. 1/72 scale F-15E and F-2A models, with attractive, precise details. - Model: F-15E Strike Eagle - Scale: 1/72 - Color: Gray/Silver - Model: F-2A - Scale: 1/72 - Color: Gray/Silver - Model: F-2A - Scale: 1/72 - Color: Gray/Silver Thank you for looking.