Emits loud 130 dB siren-like sound to scare off attacker and draw attention of others Compact, safe, and easy to use Legal in all 50 states TSA-friendly for carry-on luggage Operates with the simple push of a button deactivation button on rear of unit Backup whistle is built into the base of the alarm unit Built-in key chain so you can attach it to your keys, belt, or bag Dimensions: 3 in. x 1.5 in. x 0.75 in. Includes three 1.5-volt AG13/LR44 batteries Green
