The AL-2 is a dual purpose 120db safety alarm. It doubles as a door alarm and a personal safety alarm. Very sensitive!

Door Alarm Feature: Hang it on any door knob (non-metallic doors) and when an intruder touches the door knob, instantly the unit will sound a piercing alarm for all to hear. Chances are the intruder will flee.

Personal Safety Alarm Feature: Carry with you and pull out the metal chain to sound the alarm and deter an assailant. Uses one 9-volt battery.

Great Personal Safety Alarm for Traveling!