New, unused security alarm. This is an unused item I received. Since the transparent pin is inserted, the operation has not been confirmed. It is assumed that the battery will activate and sound when the pin is removed. Pulling the pin will produce a loud sound, recommended for crime prevention and disaster prevention during school commutes, lessons, and going home. This type is easy to attach to backpacks and bags. Please refrain from purchasing if you are concerned about minor details due to home storage. I have 4 in stock at home. If you want multiple, please let me know in the comments. 2 pieces purchased → 550 yen 3 pieces purchased → 830 yen 4 pieces purchased → 1100 yen