Low frequency rumble:
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Shoots an electric arc indoors
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Low frequency electric drone, movement
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Turn on, turn off the appliance,
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Button click
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Electronic energy, shutdown,, start up
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Electric sparks
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Small switch, toggle switch
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Low frequency rumble
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Multichannel switch
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Electrical discharge surge
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Low Frequency Electric Drone
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Current, discharge, electricity
★★★★★