The outdoor temperature is measured using a dedicated radio transmitter, while an internal sensor measures the indoor temperature. With the push of a button, either the indoor or outdoor temperature can be displayed in large format. Monitoring the indoor temperature is an important factor for a comfortable and healthy living environment and helps save energy. Even a one-degree reduction in temperature can lead to up to 6% lower heating costs. The outdoor temperature provides reliable information for home, garden, leisure, and work. Additionally, the device features a memory for high and low values, as well as a clock display. Batteries 2 x 1.5 V AAA (base station), 2 x 1.5 V AAA (transmitter) are not included.