1-4 of 4 Answers
Not at all. It should be dead silent. Humming is what the unit prevents.
Sorry, there was a problem. Please try again later.Mine is completely silent.
Sorry, there was a problem. Please try again later.It made my Xbox hum. When I used another power surge it stopped humming. It only did it to my Xbox, it didn’t do it to my other devices. P
Sorry, there was a problem. Please try again later.Exchange unit as it should not hum.
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