Nixon Siren - Unused Purchased in 2020 and never used. Battery replaced on August 30, 2025. The back cover gasket has not been replaced. It can be replaced if you leave it for about 10 days. If you wish, please handle it yourself after purchase. *Due to the issue of product substitution, the packing process is being video recorded. Thank you for your understanding and consideration. Included items: Warranty, box, booklet Please refrain from purchasing if you are overly concerned about details.