This compact and lightweight device is powered by a single AAA battery, ensuring long-lasting performance with low power consumption. A convenient low battery indicator alerts you when it’s time to replace the battery. For ease of use, the thermometer and hygrometer can be placed on a flat surface or mounted on the wall, giving you flexibility in where you place it. The unit also offers a temperature unit switch, allowing you to choose between Celsius and Fahrenheit, depending on your preference.