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High Precision Heat Sensitive Temperature Thermometer For Measure Room Temperature Quick Detail Accuracy : ± 1℃ Temperature range : 16～36 ℃ Material : PET Size :8*75 mm Principle : Liquid crystal heat sensitive color change Note : Keep it in shady and cool Valid date : 2 years Usage : Measure the temperature. Description: Liquid crystal color changing thermometers indicate the current temperature by the square on the thermometer that turns to green. If green is not visible,