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[–] 2 points 1 year ago* (1 child)

Check out AirZound, it's a bike pump rechargeable horn.

Companies also make battery powered ones that sound like a car horn.

Finally, there are impact wrench driven train horns that are over 100dB loud for when you just can't get their attention (WARNING: hearing damage guaranteed).

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  • [–] 2 points 1 year ago (1 child)

    I tried an airzound, it was not as effective as the boat horn. Though to be fair, it was a long time ago - so long, in fact, that I could go to RadioShack and buy dust remover spray to replace the canister, and it was significantly cheaper than the official refills at marine supply stores...

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