GE Personal Security Glass Vibration Alarm, Detects Vibration or Broken Glass, Easy to Use, Easy to Install, 45413 Loud alarm sounds when glass is tampered with or broken Attach to any window or glass, easy peel and stick installation - no wiring Warning sticker visible outside of window High/Low sensitivity selection, with battery test button (4 LR44 batteries included) For indoor use only - great for windows, sliding glass doors, patio doors