Bono-sama School/Commute Anti-theft Buzzer, Anti-theft Alarm 130dB Loud Volume, Waterproof LED Light

I kept this in my bag for about a month. I don't think there are any noticeable damages. It is working without any problems.
Set of two

[Safe and Secure Personal Alarm] This personal alarm is a great safety device for commuting to school, returning home from cram school, traveling, or camping. In case of emergency, simply pull the pin to activate the alarm and alert those around you to danger. With its simple design, it's a security item that can be used by elementary and middle school students, children, as well as adults, women, and the elderly without feeling out of place.
[130dB High Volume Personal Alarm] A personal alarm is an item that surprises the attacker with a loud noise, giving you a chance to escape, so a loud sound is key. This personal alarm can produce a 130dB high volume (measured at 1m), which can be heard by people far away, increasing your sense of security in emergencies. The alarm sound can last for up to 6 hours.
[With LED Light & Easy to Operate] Press the button on the side to turn on the light, and release it to turn it off. The LED light not only enhances security but can also be used as a flashlight to illuminate small objects, making it convenient! Pulling the pin activates the alarm. Returning the pin stops the alarm. It's very easy to use!
[Water-Resistant & Portable] It's a keychain type that can be easily attached to a school backpack or bag, and is easy to attach and detach! Its compact design makes it convenient to carry, making your daily commute to school or work more comfortable! It has a JIS waterproof protection rating of 4 (IPX4), so you don't have to worry as much about water getting in and preventing the sound from working on rainy days.
[Durable and Highly Impact Resistant] Made of crack-resistant ABS resin, it is unlikely to break from minor drops. This durable personal alarm is useful for preventing bag snatching, dealing with stalkers, and deterring molesters! It is also versatile and can be used not only for commuting to and from school or work, but also for travel, morning walks, dog walking, and more.