SABRE Dorm Apartment Security Alarm Kit - Includes Wedge Door Stop Alarm, Personal Keychain Alarm and Wireless Window Alarm with LOUD 120 dB Siren ATTENTION-GRABBING - extremely loud alarms helps wake/alert homeowner or renter, helps deter intruder and possibly notifies neighbors that an intrusion has been detected; 120dB Door Stop Alarm featuring non-skid pad audible up to 1,000 feet (300M) away, 120dB Door or Window Alarm audible up to 750 feet (230M) away, and 110dB Personal Alarm audible up to 500 feet (150M) away EASY INSTALLATION - battery-operated with no wiring needed; Door Stop Alarm requires 1x9V battery (not included); Door or Window Alarm requires 4xLR44 batteries (included) and sensors mount on either side of alarm; Personal Alarm requires 3xLR44 batteries (included) ATTRACTIVE, CONSUMER-PREFERRED HOME SECURITY - superior to other home security products, the premium white Door Stop Alarm and Door or Window Alarm look great inside your home REUSABLE WITH BROAD CONSUMER APPEAL - simply push personal alarms pin back in to stop sound and use again; safe for children and a self-defense option for any age EXTRA LEVEL OF SECURITY - Door Stop Alarm and Door or Window Alarm provide battery status update with a low battery test button