Recommended uses for product landing pages Colorful Black 2-Pack Age Range: Adults and Children Number of units: 2 Battery quantity: 2 LR44 batteries required Response time: 10 seconds Lower limit of nominal temperature: 50 degrees Celsius Show less About this item Measuring range: Temperature range: -50 to 70°C; Temperature deviation: ±2°C. Humidity range: 10%~99% RH; Humidity deviation: ±5% RH. Mini and simple design: Thanks to its compact size and square shape, the device can be placed discreetly anywhere. Simple appearance with practical functionality. The screen is easy to read without any operation. Widely used: Suitable for use at home, office, car, school, hotel, laboratory, kindergarten, aquaculture, instrument workshop, library, factory, greenhouse, basement, garage, garden shed, 3D printer filament storage, and other indoor environments with air conditioning. Indoor humidity monitoring: Helps measure indoor temperature and humidity over time, assisting in adjusting humidifier or dehumidifier settings and maintaining optimal living conditions. Ideal for preventing issues related to dry skin, colds, asthma, and mold growth. What you get: Digital hygrometer thermometer x 2. Each unit includes two AG13 button cell batteries. Replace the battery when the screen dims.