Unused (waterproof) security alarm. I purchased this and stored it at home without using it. I opened it once to check the operation for this listing, and confirmed that it works correctly. The contents are in a clean condition with no major scratches or stains. However, there is an oil-like stain on the outer box, so it is not recommended for gifts. Please check the third photo. (Please refrain from purchasing if you are concerned about minor details, as this item has been stored at home.) Many schools give out security alarms when children enter elementary school, but it's always good to have more than one. How about one for the backpack and another for a lesson bag? Instant purchase is OK ◎ Please feel free to comment if you have any questions.