“What color is the LED indicator light supposed to be to show this is working?”

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• If the Red LED is on, it means that the device is working (surge protected). If the LED is off, it means surge protector failed and cannot absorb surge anymore.

  Answered by RocketfishCustomerSupport 5 years ago

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• Blue, if both lines are lit you are protected. Just make sure the switch is on

  Answered by SonyFreak 4 years ago

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