The range of the digital thermometer hygrometer is 10% RH-99% RH with a tolerance of ±5% RH; The thermometer's range is -4°F to 158°F (-20°C to 70°C) with a tolerance of ±1.8°F (±1°C). Suitable for indoor use, greenhouses, wine cellars, nurseries, guitar rooms, or offices. This ambient temperature and humidity monitor allows you to easily monitor temperature and humidity in real time and make appropriate adjustments. Proper indoor humidity control is beneficial for skin, allergens, and more. With its high-precision readings and wide measurement range, this product is the perfect digital thermometer and hygrometer for the home, providing you with the best living conditions. This garage thermometer is also available as a room thermometer for nurseries, humidifiers, greenhouses, and more.