3X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,to DC 5V 12V 24V Light White-38 auspowers_batchsix Advantages: Fully automatic control

Advantages: Fully automatic control

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3X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security/Magnetic Door Switch/Magnetic Contact Switch/Reed Switch,to DC 5V 12V 24V Light White-38 auspowers_batchsix Advantages: Fully automatic control3X Magnetic Reed Switch Normally Open Closed NC NO Door Alarm Window Security Magnetic Door Switch Magnetic Contact Switch Reed Switch,to DC 5V 12V 24V Light MAGNETIC REED SWITCH The door and window magnet should be installed at the closed position of the door windowThe magnet part is installed on the movable door and window. The switch part is installed on the fixed door and window frame. The switch part and the magnet part should be aligned as much