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 believed that removing it will activate the battery and sound the alarm. Pulling the pin will produce a loud sound, and it is recommended for crime prevention and disaster preparedness during school commutes, lessons, and going home. It is a type that 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 for 550 yen 3 for 830 yen