Bests & Worsts Reviews from Amazon

Installed them today on my Prius (no relay needed, really). Tested them in a backyard (stray cats felt the urge to urinate) and went on my merry way. A few hours later, got stuck on a one lane one way street, because some idiot was trying to make his way in the opposite direction, on a sidewalk. Then he decided to make a left turn – honking his horn, demanding that I yield. Finally he got tired of punching his steering wheel and rolled down the window to have a lively conversation with me… then I honked. He jumped and hit his head, immediately forgetting what he wanted to say. HELLA vs road rager – 1:0. I'm still giggling a bit :) A few words about the actual sound. This is by no means a "big rig sound", you'll need a pneumatic horn for that. Nor is it a pleasant sound in any way, shape or form. It sounds like seven trumpets played simultaneously, so be careful – if you lay on the horn long enough, it may wake the dead. In short: obnoxiously loud screeching that is absolutely impossible to ignore, either willingly or unwillingly.