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.
π Zento Deals 12V Single Trumpet Air Horn + Compressor β Powerful Loud 150db for Truck, Boat, SUV, Train
9 Review
Car compressor Aggressor AGR-75 orange
14 Review
π FARBIN 12V Mini Air Horn, Loud Car Horn with Chrome Zinc Dual Trumpet, Compressor Wire Harness and Button for Trucks, Cars, SUVs, RVs, Motorcycles, Off Road - Mini Version with Button
9 Review
XtremeVision AC 55W HID Xenon Premium Slim Ballast - Get A Pair Of 2 PCS Now!
18 Review