A wireless thermostat for individual room (zone) temperature control, achieved through wireless units and thermoelectric heads (actuators). The desired temperature in the allocated zone is set via a control knob with rotate-press action and fine detent. Visualization is provided on a large, clear LCD display: 60 x 40 mm made of scratch-resistant plastic. Numerous functions and parameters are structured in a 3-category menu (user function, user configuration, expert configuration), preventing accidental changes to important parameters – separate factory reset is possible for user configuration and expert configuration variants. The expert configuration section is secured with a PIN code. Standards/regulations: EN60730-1 / EN60730-2-9 / RoHS compliant Material: ABS (housing, bracket, rotary knob) / PMMA (dial) Color: RAL9010 (pure white) Technical specifications Power supply: 2 alkaline batteries LR03/AAA (Micro) Battery life: >2 years Polarity reversal protection: electronic protection with MOSFET switch Radio system: 868 MHz SRD band Protection rating: IP20 Permissible ambient humidity: 5 to 80%, non-condensing Ambient temperature: 0 to 50°C Transport/storage temperature: -10°C to +50°C Temperature setting range: 5 to 30°C Measurement range: current temperature recording (internal sensor) 0 to 40°C Internal element measurement accuracy: NTC 0.3K.