• Combines the powerful blast of sound of a gas fog horn.
• Its lightweight, buoyant and will not rust making it ideal for the marine environment.
• Other uses include Fire Alarm/Warning, Golf clubs to get people of the course etc
• Instructions 
  • Blow in the small hole on the side (not the end) to produce up to 115 decibels of signal horn. 

Operates on the vibration of a plastic diaphragm, which can easily be replaced with any thin plastic film. This deceptive little horn creates a whopping noise with no need for a battery or gas canister.