Model 8C10MRB-T72 features a moisture-resistant 8-inch 15W speaker driver for utility paging and low level background music systems that may be subjected to high humidity (greenhouses, locker rooms, hot tub areas, outdoor restaurants and cafes, etc.). This model includes a mounted dual voltage (25V/70V) 5W transformer. If used outdoors, install the speaker in an area that is protected from direct exposure to the elements. Order grille and enclosure separately.