3 Review(s)

100% new, high quality It's late at night. You've turned off the TV, put the kids to bed, and turned off all the lights, but you forgot to lock the door. Sometime around 3 AM, you're awakened by the 90 dB whistle of your magnetic HDE intruder alarm. You rush out into your living room and see the front door is ajar, but nothing has been taken. It seems your inexpensive security system scared off the would-be burglar before he was able to burgle your valuables. Whether you''re worried about home invasions or simply needing to secure your gun or medicine cabinets from children, prevent a costly mistake with this high-quality security sensor system. Device is 2.5" long, and can be mounted with adhesive tape to a window or door, no tools required. 4 alarms per pack. Loud 90 dB alarm - Magnetic sensor switch detects entry protecting your home or office. Residential use: Protects exterior doors, sliding glass doors, gun and medicine cabinets. Commercial use: Protects showcases and cash registers Powered by three 1.5V LR44 button cell batteries. Operation & Installation: Use the double-sided adhesive tape to fix the main unit at the side of the door/window. Attach the bar magnet to door frame / window frame with the arrow aligning with the reference line of the main unit. Test the setup by switching the system's switch to 'ON' position of the main unit and see whether the alarm can be triggered by opening the door or window.