Delta Airzound Air Horn
The world's loudest bicycle horn, the Airzound easily clamps onto any 22-26mm handlebar. Ideal for urban riding when you need to let traffic know you're there! This revolutionary bike air horn requires no batteries or cartridges and refills with any bike pump. The volume control switch makes it easy to adjust this bike horn to your surroundings.
This IS da BOMB!!! Loud as Heck!! Often times it will cause an evacuation if I set if off near the entrance to one of the buildings at work. Like I had read before.... If your middle finger made a sound, This would be IT!!! A must have for commuting with all the tards in cages texting instead of driving.. Would be much better if it fit standard 31.8 bars and the activation switch was easier to get at, but still an excellent piece.