Our 11" x 8" weatherproof PA speaker has a 70/25V line transformer with settings of 30W, 15W, 10W, 5W, 3W and 1W. It offers a frequency response of 250 to 16,000 Hz and a 30 watt power rating. It features a sensitivity of 120 dB with an impedance of 8 ohm. A swivel mounting bracket is included.General InformationName: Speco SPC30RT Commercial Series 11" x 8" 70, 25V Weather Resistant PA Horn Speaker, Speco Technologies, Speco TechnologiesCategory: Speco Technologies, Pro AV, Commercial Audio, Pro PA HornsUPC Code: 030519182300Country of Origin: China. Country of origin is subject to change.