
It has an annoyingly loud siren alarm. This requires calibration, which has its merits but is cumbersome, as the instructions say to set the device for the first red light and the thumbwheel is sensitive (because it's ticking like a time bomb). I tested it on an unlit oven burner. It works but I don't recommend it and there are better models for $25 and never trust 5 star reviews.

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