These thermometers are as accurate as you would expect from this type. All 5 are tested and the correct color bar appears in the correct temperature range. The only real problem is how much the color bar contrasts with the black body of the thermometer strips. these things are difficult to read unless you have a light on them or are in a brightly lit room. Obviously keeping them in the sun would be pointless, so I only use the light when necessary.
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