Feature: 1. Activation Modes: The security alarm keyring can be activated in two ways, either pull the keychain or simply shake or move it. When activated, it emits a loud 130dB whistle sound and disorienting flashes. Simply double click the button to switch to vibration detection mode. 2. Ideal for Various Individuals: This safety alarm is suitable for women alone outdoors, girls traveling alone, elderly people in need of assistance, and anyone needing an emergency SOS alarm when stranded outdoors. 3. Multipurpose Usage: This alarm can be used as a home doors and windows opening alert, hotel door alarm, luggage anti theft alarm, camping tent security alarm, and anti burglary alarm for garages, or even as a bicycle theft alarm. 4. Easy to Use and Carry: This emergency personal safety alarm is simple to use and carry. It comes with a hook, allowing easy attachment to a bag, belt, jacket, keychain, and more. 5. Rechargeable Lithium Battery: The security alarm features a built‑in rechargeable lithium battery. It offers convenient charging and long standby time. As long as it has power, the alarm will sound loud. Specification: Item Type: Personal Alarm Material: ABS Battery: 100mAh Lithium Battery (built in battery) Alarm Sound Decibel: 130DBLED light: 1 level white lighting; 2 level flash . Package List: 1 x Alarm 1 x USB Charging Cable