The SpectrAlert? Advance series of mini-horn sounders are designed to simplify installations to provide primary and secondary signaling for fire and security applications.The MHR and MHW mini-horns operate at 12 and 24 volts and are ideal for hotel, motel or residential fire system applications, where a smaller notification device is desired. The mini-horns offer high and low volume settings, and temporal or non-temporal tones. The horns can be mounted to single gang back boxes for aesthetically sensitive applications.Synchronization is also provided when using the MDL module. The MHR and MHW mini-horns can operate between 32 and 120 degrees Fahrenheit from a regulated DC or full-wave rectified, unfiltered power supply. They are listed to Underwriter?s Laboratories Standard UL 464 for fire protective signaling systems.Main Features12 and 24V operationHigh and low volume settingsTemporal and non-temporal tonesMounts to single gang back boxCompatible with MDL sync moduleMechanically and electrically compatible with PA400 series Mini-Alert? soundersListing for ceiling or wall mountingGeneral InformationName: System Sensor MHW SpectrAlert Advance Mini-Horn 12/24V, White, Honeywell International, Inc, System SensorCategory: System Sensor, Fire, Fire Notification Appliances, HornsUPC Code: 783863032882Country of Origin: Mexico. Country of origin is subject to change.