Damage on the box only.
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The Hum Exterminator™ filters out unwanted voltage on the ground line that can cause ground loop hum. Simply place the Hum Exterminator™ on the end of the power cord of the equipment that has a Ground Loop and plug the Hum Exterminator™ into the wall outlet. Ground Loop is gone and signal remains intact. Easy to use, easy to install, absolutely safe and completely effective!
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