I see a white wall in the museum rectangular plastic box on the wall What is this
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Users questions: The teachers are also installed, I do not know what this is
Experts answer: which is infrared burglar alarm, many businesses, schools and other places have installed. Mainly used at night security, the effect is still very good.
Experts answer: which is infrared burglar alarm, many businesses, schools and other places have installed. Mainly used at night security, the effect is still very good.
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- This information provided by the users.Thanks!
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