No need to set clocks manually ever again. Models HN 415, HN 420, HN 425 and HN 425 R control one or two MOBALine clock lines. This allows the connection of self-setting MOBALine secondary clocks. Installation and maintenance costs are thereby considerably reduced. For the models with two clock lines these can be separately programmed as MOBALine or minute, half minute, second pulse lines. The addition of a radio receiver allows synchronisation of your Master clock with the Atomic clock at Rugby in the UK. Typical uses for Master clocks would be schools, hospitals, large office suites.