Sirennet 150 Watt Siren Speaker Power rating: 150 Watts. Frequency Response: 700-2700Hz. Impedance: 11 ohms Neodymium magnet. 85 degree sound dispersion. Weight: 6.35 lbs Lightweight plastic housing. Corrosion-Resistant Black Finish. Includes a universal bracket that fits most vehicles. Size: 7" H x 7" W x 3" D Whelen 2 Year Standard Warranty