Let's maybe clear the waters a bit. In my memory Hornit was ridiculed in these forums. Denali horns require a motorcycle level power supply. Sinji running off two AAA batteries are going to produce a mosquito level sound. This leaves from this list the Loud Bicycle Horn as the only practical contender, employing in fact sensible components for the task. Having a regular bike bell in addition to a device for special circumstances is the common-sense solution.