The patented hornit db140 is the loudest cycle horn on the market and puts the cyclist in control of their own safety its small sleek and enables cyclists to alert distracted drivers and pedestrians to their presencea powerful 140 decibels in piercing soundalerts car bus lorry drivers pedestrians2 sounds piercing and car horn soundremote trigger safe and easy to use when brakingfits all bikesip44 standards weather proofincludes batteries