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MAGNETIC ALARM
Barnes and Noble
MAGNETIC ALARM
From 4M
Current price: $16.99
Barnes and Noble
MAGNETIC ALARM
From 4M
Current price: $16.99
Size: OS
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Explore how a magnet sets off this cool intruder alarm. Its a fun project for exploring how a magnetic switch works in an electric circuit. Plastic parts, wires, screws and detailed instructions. Requires - 1.5V AAA batteries x 2
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