Magnetic Sensor Door Window Entry Alarm Home Security Wireless Super Loud Sound Switch Protect Home Office

Features:Easily mounted by a adhesive tape to window or door .Magnetic sensor switch detects entry protecting your home or office whether you are in or out .Warning door /window sticker is supplied free in package.Operated by 3 pcs 1.5VLRR44 button cell(battery in package)Operating Instructions:1.Use the doubleside 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.2.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 /window.3.90 db alarm can be heard throughout the home and officeDimension:Main unit: 6cm* 3cm2cmBar magnet5.4cm1.3cm*1.1cmPackage contents:1x Door /Window Entry Alarm3 x 1.5VLRR44 button cell