Mains-independent, battery-operated room temperature controller with easy operation, clear display and large digits, - Self-learning two-point controller with PID behavior (patented), - Choice between the operating modes:, - 7-day automatic operation with max. 3 heating or cooling phases, - permanent comfort mode, - permanent energy saving mode, - Frost or overheating protection, - Exception day (24-hour operation) with max. 3 heating or cooling phases, - In automatic mode and on the exception day, a separate temperature setpoint can be entered for each heating or cooling phase, - For controlling a heating zone, - Possibility of controlling cooling devices