Lambo's Horns can absorb, store and release electricity. The present Lambo has yet to notice his horns' power and can only release the lightning stored in his horns when his fear reaches its climax. The future Lambos use the lightning stored to perform techniques such as Elettrico Cornata.
At some point, 25 year old Lambo lost these horns and had to use replacements. During his fight with Leviathan, however, he was given his horns by Iemitsu through a complicated time paradox, and declared that he could finally fight at full power.