Super Powerful Siren Mini Siren - 130db protects you in case of danger or need help. Loud sirens have a strong impact and can also attract attention from afar. If you run alone at night and meet bad people following you, you can turn on the alarm clock for help, and the alarm clock sound is very loud, do not put it in your ears. Waterproof USB rechargeable design - personal alarm with built-in battery for cycle charging. The red light is always on while charging and turns off when charging is complete. Charging time is only 30 minutes and lasts a long time. Life waterproof. Emergency LED Flashlight: Built-in LED flashlight provides quick illumination when walking in the dark, can sound an alarm to prevent you from getting lost on the move, or use the flashing LED flashlight function often to attract the attention of others. Draw it and ask for help in time to keep your life safe. Lightweight and Portable: Double loop design can be attached to backpack, school bag, purse, belt, suitcase or key chain and provides perfect protection for students, women, runners night and night workers. If you need to sound the siren, press the SOS button twice quickly or pull the siren tag. Best Gift Choice: 2 different color alarms, each individually wrapped. A personal alarm clock is the most intimate gift for older children, friends and family.