If it looks like a ‘Q’, and sounds like a ‘Q’, it must be an e-Q2B”. All of the sound of the traditional “Q, with the features of an electronic siren. Low current draw, only 30 amps continuous. 122 decibels at 10 feet. Features “Q” Wail, yelp, air horn, PA, radio rebroadcast, and “Q” Brake. Can be used with a pair of the following 100-watt speakers: MS100, BP100, CP100, and TS100 Foot switch compatible. Noise canceling microphone included. Digital Signal Processor (DSP) technology creates the familiar “Q” sound.