Super Powerful Siren: Mini siren - 130db protects you in danger or when you need help. High-pitched sirens have a strong impact and can attract attention from afar. If you're running alone at night and feel followed, activate the alarm for help; the alarm sound is very loud, so avoid placing it near your ears. Waterproof Rechargeable USB Design: Personal alarm with a built-in battery for cycle charging. The red light stays on during charging and turns off when charging is complete. Charging time is only 30 minutes, providing long-lasting use. Lifespan waterproof. Emergency LED Flashlight: The built-in LED flashlight provides quick illumination when walking in the dark. It can emit an alarm to prevent you from getting lost on the go, or use the LED flashlight function with frequent flashing to attract others' attention. Pull it to seek help promptly and keep your life safe. Lightweight and Portable: The double-buckle design allows it to be attached to backpacks, school bags, handbags, belts, luggage, or keychains, providing perfect protection for students, women, night runners, and night workers. To sound the siren, quickly press the SOS button twice or pull the siren tag. Best Gift Choice: 2 alarms in different colors, each individually packaged. A personal alarm clock is the most intimate gift for older children, friends, and family.