All your patent are belong to us
For your MTB, road or your fred-ly segway. If you ride in NSW you will need a bell otherwise the donut eating po po will pip you for not obeying their taxpayers money wasting rules.
It has a nice long 5 second "tiiiiiing" sound, slightly soothing and not too aggressive sounding - especially if you are the pedestrian.
Range of colours to match your bike