YSTD&reg; Loud Personal Anti Rape Security Alarm Alert Attack Panic Emergency Egg Keychain (Black) This Personal Rape Safety Alarm can Protect yourself against intruders/attackers. Its loud, safe and stable Loudness: 120 dB Convenient to use and carry, low power consumption, ultra-loud alarm. Powered by 4 LR44 button batteries (included) Ideal for night shift workers, ladies, elderly, disabled, joggers, and those traveling alone.