Peace of Mind - Are you worried about intruders breaking into your home, or about your child"s safety? Now you can have peace of mind knowing that you"ve installed a premium quality Glass Guard Alarm system in your home. The Glass Guard Alarm system adds a level of security to virtually any door or window. When the alarm is triggered, a 101 db ear piercing ultra decibel sound is emitted indicating that your security may have been breached. Installs in Seconds - It installs easily. There"s no tools or measuring required. Simply peel off the adhesive backing on the alarm unit and stick it in place. It"s just that simple. The Glass Guard Alarm System installs in seconds on any window in your home or office. Featuring a dual sensitivity switch, the Glass Guard Alarm sounds if the glass is broken or with even modest vibration in the high setting. The "Peel and Stick" Flipo Glass Guard Alarm System gives you fast affordable protection. Uses AAA batteries (not included). Glass Guard Alarm can also be used on non-glass surfaces. Ideal for glass windows and door. Features variable sensitivity settings.