【130dB High Decibel Personal Alarms】- Emergency self defense siren loud enough, commonly used by school bullying, falling, feeling unsafe, physically threatened, medical emergencies, accidents, or allergic reactions, etc. Helps Prevent kidnappings & abductions. The sound lasts for 50 minutes and has a flashing, the security alarms keychain even 300 yards away, alarm siren song also can attract the attention of nearby people, and get help quickly. | 【USB Rechargeable Function】- Personal security alarm is made of rechargeable lithium battery, using the USB cable to charge, 30 minutes for fully charged, standby 6 months, no need to replace the battery, reusable and durable with long batteries life. It perfectly replaces the traditional self defense personal alarm. | 【Easy to Use】- Personal safety alarm siren no requires training or skill to operate, have two ways to use in case of emergency or need help, pull up the self-defense keychain alarm, the personal alarm will sound, inserting it to stop; double press the SOS button will also open the alarm, long press to stop. Protect yourself in a moment of need with self defenses siren. | 【More Stronger and Convenience】- The LED emergency flashlight of self defense keychain is bigger and brighter than traditional security alarm, light time 75 min，flash time 5.5 hours; uses environmental and durable recyclable ABS material, IP44 waterproof resistance, has a portable size can be easily carried around, attached to purse, backpack, keys, belt loops, etc. You can take it even on the plane. | 【Perfect Gift&Service】- Suitable for everyone, maximize your personal safety & security anywhere, everywhere, A perfect defense mechanism for Students, Elders, Kids, Women, Joggers, Night workers, etc. Your purchase is a 100% guarantee. If you are not satisfied with the personal keychain alarms, you could contact us for a refund or replacement anytime.