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• High Sensitive, Simple, Convenient, No adjusting

• 9V fell to 7V, detection range is constant

• Save electricity, continuously work more than 40 hours

• Alarm by buzzing or vibrating

• Automatically buzz or vibrate continuously, when the battery run out of 

• Boot or shutdown, the detector will buzz or vibrate

• Sensitivity level, high and low, two options

• Have plug in socket