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. 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 1 x Alarm 1 x USB Charging Cable