Califone PHT15 Paging Horn, Built-in 15W/7.5W/3.75W/1.8W multitap transformer & screwdriver-adjustable power taps with 100V & 70V modes, Sensitivity 105 dB (1W/1m), Frequency range 400Hz ~ 9KHz, Wire 0.4m, Steel bracket with 3 predrilled holes for secure installation, All-weather construction, UPC 610356830017 (PHT-15 PHT 15 PH-T15)