Product Description 1140db Safe Sound Personal Alarm: The emergency alarm can make a loud sound to draw attention to protect you from having an emergency even at distances as far as 606.9 ft. In addition, the sounds could last 50 minutes continuous ear-piercing alarm. High Powered: This Personal Alarm equips with 3 AG13/LR44 batteries for extended life! The AG13/LR44 batteries are the secret to this alarm's painful loudness. They'll last up to 365 days before you need to consider replacing them. 2Ultra Durable & High Quality: The Portable Personal Alarm uses superior environmental and durable ABS plasticn, resistance to fall, crush and voltage, and high temperature, and the copper plug, not rusty, beautiful and durable, won't break in your most adverse 3Waterproof & Portable-The portable personal alarm uses excellent environmentally friendly and durable ABS plastic, which is resistant to drops, pressure and voltage, and is IP44 waterproof. It can be used normally even if it rains. It can be carried easily and can be hung on wallets, backpacks, keys, belt loops, etc. 4Simple control-This alarm is easy to operate, pull out the alarm pin. You need to press and hold the button to enter the LED lighting mode and release it to stop the lighting mode. 5Committed to bring you a safe and effective self-defense alarm device. When an emergency occurs, the victim can have the opportunity to call for help! Protect yourself in a moment of need with Self Defense Siren.