More safety in the home and in business etc. Also ideal for the protection of personnel against attacks on public authorities, etc. Easy Pull the alarm loop immediately activates the alarm time. Instant alarm usually generated attention and can help to beat the attacker to flee. With constantly flashing LED to deter the offender. With wall bracket for easy installation example next to an apartment entrance door or even for a concealed mounting under a desk, for example. Convenient battery operation 2 x 1.5V AAA batteries (batteries not included) With Battery control.