With the lid on this is a straight forward night light of a colour of your choice. Without the lid, the stars and moon patterns is protected across the ceiling. This can be set to multiple colours with a seperate button for white light also This light Has a timer Can be stationary or set to rotate Has multiple colours Has a seperate on/off for white light The cover done has a crack down it but this does not affect performance in any way, especially as the dome is not required to project the stars. This is powered by USB 12v (cable included).