TOWODE Wired Magnetic Surface-Mounted Door Window Contact Reed Switch Personal Gap Alarm, Cabinet Strip Light Switch NC DIY Kit, Pack of 10 with 40 Screws 10 Wired Magnetic Contacts auspowers_batchsix 5mm Ferrule) (Pipe Size: 1/2"

5mm Ferrule) (Pipe Size: 1/2" NPT)

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TOWODE Wired Magnetic Surface-Mounted Door Window Contact Reed Switch Personal Gap Alarm, Cabinet Strip Light Switch NC DIY Kit, Pack of 10 with 40 Screws 10 Wired Magnetic Contacts auspowers_batchsix 5mm Ferrule) (Pipe Size: 1/2"TOWODE Wired Magnetic Surface Mounted Door Window Contact Reed Switch Personal Gap Alarm, Cabinet Strip Light Switch NC DIY Kit, Pack of 10 with 40 Screws Product Features Reed Switch : IMPORTANT : When the magnet is near it makes connectivity, when the magnet is removed connectivity is broken. Wired magnetic door windows contact can be added to wireless wired Alarm Systems.(some wireless system has wired zones) No External Power Needed : Connect to