Let cars know you're coming with this very loud bike horn, which clamps easily to any handlebar. It's super loud, blasting out a warning at 115 dB!  If that's too loud  for your taste, you can use a handy volume control to reduce the volume. This revolutionary bike air horn requires no batteries or cartridges and refills with any bike pump.  The world’s loudest bicycle horn, this loud bike horn easily clamps onto any 22-26mm handlebar. Ideal for urban riding when you need to let traffic know you’re there! 

Super Loud 115 db with all these features:

• No batteries or cartridges required
• Volume control switch
• Clamp for mounting on 22 - 26mm handlebar
• Refills with any bike pump
• 35" from bottle to clamp 
• Weight: 227g