In socket block there is 1 power socket and 2 empty places for custom modules.
In empty places you can put:
And other custom modules what you can order on special order.
In addition you need Device supply cable GST18.
If you use 2 socket blocks in addition you nead Device extension cable GST18 - 2 pcs and Multiplier.
On special order you can order socket blocks in white or black color.