Constant-Directivity 40w Paging Speaker w Rotating Bell Coverage of 60 Degrees x 40 Degrees Across a Wide Frequency Range for Predictable Beamwidth Control Molded of High-Impact, Neutral-Grey Polycarbonate Resin with UV Light Inhibitor Rotating Bell Pivots in 15 Degree Increments for Exact On-Site Positioning of Projection Angles Universal 25/70/100V Transformer Includes a Rotary-Dial Selector for Easy Tap Identification Zinc die cast mounting bracket may be mounted to standard E.O. boxes banded to poles or removed for easy retrofit of existing AP Series loudspeakers.