Sport Air Horn

Samui Corporation, Canada brand.
Up to 115db. 
No need to buy refills.
No vapours or chemicals.   Non corrosive.  Non-toxic.
Refillable with any source of compressed air - garage, bicycle pump or compressor. Up to 50 half second blasts.
A volume control is incorporated.
For use in all types of weather.  It floats. 
Save your money, save our enviroment.
Applications: Sports events (stadium safe - no chemicals), marine safety, camping, hunting, construction & industrial sites etc.
To refill lift the red operating lever to expose the standard car valve.  Refill to 80psi (5.5bar). Maximum pressure 100psi (7bar).