If you use our switches in a normal set-up then the wiring would be 2+1, however if you want to use the switches in a 2 way set-up then it would require 3+1. The dimmer's functionalities are still being investigated, so this will be updated when there is more information. The Light Switch supports 2-way communication.
Just to clarify, 2+1 means twin & earth and 3+1 means 3-core & earth.
N.B. All installation of Den Lights Switches and Den Socket Outlets should be carried out by an Electrician.