The master socket contain a surge arrestor and R/C circuit filter these are used by your service provider to get a fixed value resistance when they run line checks.

Standard BT type socket with screw type terminals.

Flat Plate low profile design

Ultralow profile design with built in gasket

Certified to BS 5733

Minimum mounting box depth: 25mm

Dimensions: 87.5mm x 87.5mm

IP Rating: IP20

15 year warranty