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Wireless Sensor temperature and light intensity RCL-02 designed for direct cooperation with selected receivers of the exta free system. This sensor does not work with EFC-01 and EFC-02 controllers. It can be successfully used in the process of controlling window blinds or to maintain thermal comfort at home. After setting the set values and hysteresis values, the sensor sends the appropriate on / off commands to the receivers associated with it in the system. The interface in the form of 4 buttons and a display allows you to quickly enter settings and read the current temperature / illuminance value. The sensor is powered by batteries (2 x LR03 AAA). Appropriately high degree of protection of the sensor housing (IP54) enables its installation outdoors. The sensor has special software solutions that extend battery life. A wide measuring range, high measurement accuracy and a large operating range are additional advantages of the sensor.