How about giving this to children, grandfathers, and grandmothers? Volume: High volume of over 92dB to alert in case of danger. Waterproof Performance: Certified with JIS waterproof protection level 5, providing high-level waterproof performance that can withstand torrential rain. Accessories: Includes a mini screwdriver for battery replacement and a whistle that can be used in emergencies even without batteries. Power Source: Uses 2 alkaline AAA batteries (sold separately). Recommended Product: Recommended by the National Anti-Crime Association Federation. ⭐️Stored at home ⭐️New, but contents have not been checked. ⭐️Slight possibility of box being crushed For those who understand used items...