It runs in 3 separate modes. 1, on/off just use the button to switch on and off (obviously), you can use an external timer to set day length, but no control on colour settings. 2, Blue light for night time viewing (i wont use this as it would encourage algae). 3, Bluetooth connection to your phone via the fluval app.
https://www.amazon.com/Plant-Spectrum-Fluval-Bluetooth-Freshwater/dp/B07BBWVDMS

