Din rail Pass Through Green Relay , powered by 12mA/24 VDC from Bus, can work as ON/OFF for Lighting, Small Pumps, water heaters, Solenoids of Irrigation , security buzzer, siren and flasher, and Industry use. Small and elegant with labeling place, life LED indicator, broadcast address button. Can be used in any location that require energy saving, intelligent control such as Factory, apartment, Villa, Offices, Restaurant, Hotel rooms , Convention Center, Shopping Mall, Residential Building, Banquet Room, Stadium, Airport, Theme Park, Gymnasium, , Smart Mansion.