Attached to my mountain bike's front fork stay to warn riders. This is a nice addition to the already bright headlights, taillights and fog lights. It's loud enough to be noticed at traffic lights/intersections. I wouldn't recommend it for a scooter/motorcycle at speed, with engines/exhaust it probably won't be heard. Sounds like a clown horn to me, but in terms of size and price, any disc horn will do. It's only rated for 1.5 amps, so most switches and LiPo batteries can power it. I didn't test it below 12V as I used a boost converter to keep 12.45V from two 11.1 LiPo batteries in parallel.
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