Ultra-powerful siren The -130dB mini-siren protects you in case of danger or in need of help. The loud siren has a powerful impact and can also attract attention from a distance. If you run alone at night and meet bad people following you, you can turn on the alarm and ask for help, the alarm sound is very loud, please dont put it in your ear. Waterproof and rechargeable USB design - The personal alarm has a built-in battery that can be cyclically charged. The red light is always on when charging and off when charging is complete. The charging time is only 30 minutes and it is long lasting. The waterproof of the personal alarm is IP44, which is not afraid of wind or rain and can protect you for 24 hours. Emergency LED flashlight: The flashlight Built-in LED provides quick illumination when walking in the dark and can sound an alarm to prevent you from getting lost while traveling, or use the LED flashlight function, which flashes frequently to attract others attention. draw yourself, to seek help in time and to protect the safety of your life. Lightweight and portable: double buckle design can be attached to backpacks, school bags , wallets, belt loops, suitcases or keychains, and provides perfect self-protection features for students, women, night runners and night staff. If you need to sound the siren, just press the SOS button twice quickly or pull the siren tab. Best Gift Selection: The alarm is individually wrapped.The alarm personal is the most intimate gift for older children, friends and family.