Make yourself heard. 115db (real LOUD) of air charged power will get the attention of any motorist. Bottle fits in the waterbottle cage and has a handlebar horn mount. Recharge it with a Schrader pump. Quick release mounting.
Plenty of volume to get the attention of motorists, pedestrians and other cyclists
Fits conveniently in your water bottle cage
Pump it back up with your Schrader valve bike pump
Quick-release mount lets you take it with you when you get where you're going