Twelve Operational Modes: Wail, Yelp, Air Horn, Phaser, Intersection Mode, High-low, Warble, Whoop, Pa, Tap, Standby And Radio Rebroadcast. Optional Park Function Deactivates siren Tones When Vehicle Is Shifted Into Park. Control Panel Lights flash When Park Function Is Engaged.  PA And Air Horn Modes Continue to be operable while In park function. Powder-coated Steel Housing With Anilluminated Faceplate Has A Rotary Switch For Mode Selection; Three push-button Switches For Air Horn, Phaser, & Intersectionfeatures; An On / Off Dial With Adjustable Volume Control; And Ahard-wired, Noise-canceling PA Microphone. Powers One 100w Rms Speaker With An 11 Ohm Impedance ( Included) . Plug-in Connector Simplify installation. Solid-state Electrical components. Engineered To Withstand Reverse polarity And High-voltage Spikes. Made In The U.S.A. 12 Volts / 100 Watts Current Draw:  10a Average / 15amax Dimensions: 2+" H X 6" W X6+" D  ( Siren Control box- $310, Siren Speaker -$140 (Total $450.00)