Part of the Bristan sensor system requiring the Bristan sensor box (IRBS-CB) for use. These were installed in a renovation. However, the client changed the spec and as such these items were removed. They were not even full installed as there was no water to the building at the time. Now no longer required. Comes as pictured. Selling these items in component pieces as the full sets were not recovered. Check my other items for sale to see what’s there.