This is my second purchase of this product, the first was given to a colleague as a gift. This multi tester is great, I checked all my USB network connections to check the output and even tracked the battery levels of devices (phone and tablet). I haven't installed or used the alerts feature, but this can be useful when doing long-term trend analysis. I never knew how much I needed something like this until I bought it. You know, I can't imagine not having it.
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