Features:  
1-10v interface to control Electronic ballasts, transformers and dimmers
Control of the light intensity in dependence of the daylight portion in the room (constant light control)
Switches on automatically in cae of a presence detection and a too low daylight portion in the room, Integrated switch output (5-10a)

Advantages:
Can be integrated easily into existing lighting systems if using dimmable Electronic ballasts
No operation necessary
Can be used in rooms in which illumination is to remain constant
Presence recognition can be switched off.