130 dB Personal Alarms: Each personal alarm emits a loud 130 dB sound to attract attention, deter attackers in emergencies, and provide crucial seconds to escape or get help. Durable and Waterproof: Made of ABS with an IP44 waterproof rating, this self-defense alarm can be used normally even in rain. Personal Alarms with LED Light: Features a night light function. These safety-oriented alarms are equipped with LED flashlights for use at night or as a light source in the dark. USB Rechargeable: Features a rechargeable design with a 130 MAH lithium battery and USB charging cable. Ensure regular power checks; low or no alarm sound indicates low battery. Recharge as needed. Perfect Gift Choice: The alarm keychain design can be attached to bags, backpacks, keychains, belt loops, and more. It's portable and suitable for students, joggers, the elderly, children, women, and night workers.