At 140db it39s equivalent to a jet engine and 4 x louder than the competition now cyclists can actively alert lorries buses cars and pedestrians to their presence rather than hoping to be seen which makes cycling saferpiercing 140 decibel sound2 modes including quieter 39park39 modeversatile design fits all styles of bikerubber trigger stretches round all handlebarsthumb rests comfortably on triggersafe and easy to operate even when brakingeasy to installip44 splash proof