Because it is black, the relay looks uniform when you group several units together in a row.
Left/LC&D Lighting Controls GR2448/Relay Strip Circuit board/(L114)
A nice touch is the long wires that let you position the relay switch comfortably.
Open the package and you will find that it centers around a solid relay base w/ relay.
A nice touch is that the Clipsal brand is clearly visible, and it pairs nicely with their other modules.