1. 130dB Safety Personal Alarm: The emergency alarm can make a loud sound to attract attention and protect you from emergency even at a distance of 150m. In addition, the sound can continue for 50 minutes for a continuous screeching alarm. 2. High Power: This personal alarm comes with 3 LR44 batteries for extended life! LR44 batteries are the secret to this loud siren. They can last up to 365 days before you need to consider replacing them. 3. Multi-function: with LED lights, emergency alarm can be applied to night lighting, suitable for students, the elderly, children, women, night workers and other people of all ages; you can also use them for travel, hiking, camping and Walk the dog at night. 4.Compact and convenient: The security alarm keychain has a portable size, which is easy to store and carry; it can be hung on women's bags, backpacks, school bags, belt loops, suitcases, keys, dog leash, etc.; you can carry it even on the plane . 5. Durable and high-quality: The portable personal alarm is made of high-quality environmentally friendly and durable ABS plastic, which is resistant to drop, pressure, voltage and high temperature, the copper plug does not rust, beautiful and durable, and will not be damaged in your worst case condition.