“Are these supposed to make a consistant high pitched buzz noise ? It can only be heard with my ear next to it. It gets a tad bit louder with the LCD screen on but still unable to be heard unless my ear is close to it.”

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• Never hear mine unless it is overloaded.

  Answered by SantaDuffy 2 years ago

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• Thank you for your inquiry. There may be some slight noise coming from the UPS because of the electrical components inside in the unit. To me it sounds like the noise coming from UPS is normal since you are only hearing it up close.

  Answered by APCProductSupport 2 years ago

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