The Kahlenberg KB-15G is a type approved Electronic Horn and Voice Hailing system for marine use that produces a powerful horn signal for all types of vessels up to 20 meters in length. In addition, the KB-15G-TB model provides two way voice communication for marine hailing purposes including "talkback" from crew back to the helm station speaker/microphone. Included are a "black box"control module for mounting inside the helm station, "push to talk" speaker/microphone with mounting bracket, and a high output marine duty speaker made entirely from corrosion proof materials. Auxiliary inputs are included for connection of other audio sources such as radios or public address systems. The KB-15G Horn Signal is ideally controlled with the Kahlenberg M-127 rocker switch, but can be configured for use with any standard momentary contact push button or Kahlenberg Signal Timer/Control for automatic operation.