10pcs Surface Mount Alarm 10W 100V 0.5A in Max Magnetic Contact Ideal for Door Window Security
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$13.99
【Reed Switch】When the contact magnetic is near, the switch is close , current will run through it ; When the contact magnet is away , the switch is open ,no current could run through .
【No External Power Needed】 Connect to wired alarm control panel, GND (Positive) Connect with NC(Negative) ports directly which make signal stability and no trouble for the battery.
10pcs Surface Mount Alarm 10W 100V 0.5A in Max Magnetic Contact ,including 40pcs screws .
