Hella Supertones are the horns to have for getting the attention of other vehicles on the road. Hella uses a combination of low tone (300Hz) and high tone (500hZ) disk-type horns to project a powerful 118dB sound that is designed for highway use.
Hella includes the two 12V Supertone horns each with a mounting bracket, a relay and wiring instructions.
Dimensions (single horn):
Diameter: 4.675 in / 124 mm
Thickness: 2.125 in / 55 mm