Model Number: Motorcycle siren speaker CJB40AM Brand Name: Senken Key Specifications/Special Features: L: 146mmH: 257mmMounting: permanentRated voltage: DC12VRated power: 20W+20WNet weight: 3.2kgSound compression level: 109-114dB1.High intensity shell, light body, resistant to high corrosion and color fade.2. With three output tones: Wail, traffic and siren, low distortion.3.A set includes one main speaker and one subsidiary speaker.4.Capable of matching with wire or wireless amplifier.5.Add-on controller for halogen flashing lamp built on subsidiary speaker.