Radio brightness twilight sensor, pure white, with solar cell and battery (service life 5-8 years). For indoor and outdoor use. LxWxH: 60x46x30mm. The sensor covers the range from 0 to 30,000 lux. Actuators in the twilight switch function can evaluate the range 0 to 50 lux. The radio sensor can be programmed into the following actuators and the Professional Smart Home Controller: FKLD61, FLC61, FLD61, FRGBW71L, FSB14, FSB61, FSB71, FSG14, FSG71, FSR14, FSR61, FSR71, FUD14, FUD71, FUD61.