TWO IN ONE: The mini digital hygrometer thermometer with built-in probe, electronic thermometer and hygrometer for measuring temperature and humidity for indoor use. EASY TO INSTALL: Our humidity meters gauge can help you to konw the current temperature and humidity, embedded opening size (1.81x1.06 inch) . If the size is not suitable, it can be fixed with double-sided tape. HIGH DISPLAY: Humidity Meter measurement accuracy: ±2℉, humidity measurement accuracy: ±5%. WIDE TESTING RANGE: Humidity meters measuring range: -58℉-158℉ , humidity measuring range: 10%-99%. WIDELY USED: The indoor thermometer hygrometer widely use in greenhouse, garden, guitar case, incubators, brooders, , cellar, fridge, closet any other place that requires monitoring of temperature and humidity levels., Weight: 0.24691773344 pounds, Manufacturer: rirue