SelecTone 15 Watt Amplified Speaker, Hazardous Location, 120VAC, Gray - Available in 24VAC/DC, 120VAC and 240VAC. Reliable, solid-state circuitry. Digital signal amplification. Fused input and output. Built-in gain control, adjustable between 0 dBa to 110 dBa at 10 feet (0 dBa to 120 dBa at 1 meter)