Bticino HC4657M4 Notice D'emploi page 15

Your control
■
The Nighter/Whice Control is an SCS control where traditional
pushbuttons are replaced by capacitive sensors.
Lightly touching the area of a sensor with your finger is like pressing
a button.
There is a blue LED in the middle of each button area; when you put
your finger on it, the intensity increases considerably and remains like
that until it moves away.
This effect confirms that the command has been sent.
15 15