Features: Built-in 70V transformer, providing 1, 2, 4, 8, & 16 Watt taps, + 8W direct; high intelligibility, used for paging into large or high noise areas; all metal weather proof construction for indoor or outdoor use; screwdriver selectable wattage taps; universal swivel mount base; beige baked enamel finish. Specifications: Power Capacity: 16 Watts (Continuous); Impedance: 8W Direct, or 25/70.7V transformer; Wattage Taps: 25V: 0.5/1/2/4/8, 70.7V: 1/2/4/8/16; Frequency Response: 350-15,000 Hz; Dispersion Angle: 130; Sound Pressure Level: 119dB at rated output measured on 4 axis; Sensitivity as a microphone: -28dBM Dimensions: 8-1/8" Bell x 9" Deep