Installing and monitoring security systems in the homes of U.S. judges nationwide will cost almost $5 million in its first year, with about two-thirds of the judges signing up for the equipment so far, according to the U.S. Marshals Service.

Of the 1,600 judges who have said they want the systems, about 400 have been installed by the government’s contractor, ADT Security Services, said John McNulty, a spokesman for the U.S. Marshals Service in Washington. There are about 2,200 federal judges.