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[Amazon/Walmart] 4-Pack Philips Window and Door Security Alarm - $8.18 (was $18.99)
On sale at:
Features:
- Ward off would-be intruders with a 120-decibel alarm triggered by a high-quality magnetic sensor, or choose for a chime to sound when windows or doors are opened and closed
- Completely wire and hassle-free mounting with the included double-sided tape, everything you need is included in the box
- Powered by four long-life LR44 button batteries (included) and features a battery test button and low battery indicator to keep you notified of current power levels
