Glass Breakage Alarm

The 100db Glass Breakage Alarm is an effective low-cost vibration alarm that can be used for securing windows or doors. The glass alarm can also be used as a personal property alarm to protect computers, TVs, stereos, cabinets, etc. Turn the switch on the side to the ON position. When the glass is hit, knocked or broken by anyone or anything, the siren will sound for approximately 30 seconds before it shut off and resets. 100dB Alarm 12V Battery (included) Install with Double-Sided Tape (included) Warning Sticker (included) Model 312G Size: 2" x 2½" x 1"