In simple terms, the phrase "dual horn" refers to having two horns. It means something or someone has a pair of horn-like features or objects.
Sentences with «dual horn»
Safety Features: It includes a few significant protective aspects like dual horn, driver side seat belt reminder as well as front disc brakes. (cardekho.com)
Its distinct features include the large spiked club like tail, fangs, and massive dual horns on the front of its head. (ign.com)
... electric wipes, and factory style dual horns automatic transmission. (cars.trovit.com)