Kstar Wireless Door Window Open Alert Home Security System Siren/Alarm Door & Window Door Window Alarm(105)
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Best Within Price Range: PagKis Window / Door Entry Alarm - A Simple Answer To Security Worries.No Wiring Required. No technical expertise required for installation. Use the double sided adhesive tape to fix the main unit at the side of door or window.Attach the bar magnet to door frame / window frame aligning with the reference line of the main unit.Magnetic sensor switch detects entry protection your home or office whether you are in or outAs soon as doors or windows are opened, the magnetic sensor will trigger the alarm to go off at 105 DB, which is super loud and can be heard throughout house, office and by your neighbors. Operated on 3 x 1.5 V LR44 Button Cells (Included)