To operate JBL LED SOLAR Natur individually or in combinationWith a JBL LED SOLAR Effect. Biotope data, effects, thunder storm, sunrise and sunset to be operated by mobile. Easy to operate: replace existing IR receiverWith the JBL control unit and adjust the effects youWantWith the app. With 5 programmes + additional manual programme (South America & Africa biotopes, aquascaping plants,goldfish, community aquarium, each programme has plant acclimatisation setting). Biotope data contain dry andWet season, cloudiness,Lightning storm, asWell as sunrise and sunset Package contents: control unit to connect to the JBLLED SOLAR system for 2Lights (1x Natur & 1x Effect). The app you require is always free of charge.