The Viking 25AE provides paging for outdoors, factory, or warehouse environments, The Viking 25AE paging horns are the best method of producing understandable sound. Use with Viking paging units (PA-2A, PA-15, PA-30, PA-60, HF-3W, M2W) or to any paging system with an 8 Ohm output. The Viking 25AE's directional design allows the installer to focus the sound cone down aisles and toward work areas.