Simply sticks to the back of the tile wood ceramic or drywall surface. - Ultra slim -only 8mm and can be fitted in wet areas such as by the sink shower or bath. - Stick on transferable decal is supplied. - Up to 6 touch sensors can be used in one room. - Alternatively switches can be located by using matching mosaics shells or pebbles. - The power needed is supplied by a plug in transformer with a 3mtr power lead (the rest is wireless).