Wireless temperature and humidity sensor in glossy pure white, measuring 75 x 25 x 12 mm, equipped with a battery (lifetime of 5 years) and a solar cell. This smart home sensor measures relative humidity between 0 and 100% (±5%) as well as temperature between -20 °C and +60 °C (±0.5 °C). In the event of a change within 2 minutes, it sends a data telegram via Eltako building radio. If there is no change, a status telegram is sent every 10 minutes. It can be mounted using adhesive, with an adhesive film included. The electronics are powered by an internal CR2032 button cell. To replace it, simply open the housing. This is also necessary to activate the battery supply by removing an insulation strip. In the default state, the EEP: A5-04-02 is active, and the internal jumper is connected to only one pin. This jumper can be switched to EEP: A5-04-03 by opening the housing and connecting it to both pins. To teach it to a learning-capable actuator, the housing must be opened and the internal button pressed.