Two new additions to the SpectrAlert ceiling-mount series are from System Sensor. The 115 and 177 candela models come in strobe, horn /strobe and speaker/strobe configurations. The models accommodate larger coverage areas, including 50’x50’ spaces and ceilings up to 30’ in height. The SpectrAlert 115 and 177 candela models are operated over a standard 24-volt NAC circuit. Special 120-volt circuitry, or wiring, is not required. Both models are UL 1971 listed.