They’re not kidding about the ‘blaster’ part. This horn generates a shattering 132 decibels and will likely get just about anybody’s attention, even if they happen to be ensconced in a giant SUV with a phone glued to their ear. And that, of course, is a good thing... we all know that stock motorcycle horns are at times rather underwhelming. Fix all that and let ‘em know you’re there with this important safety device. Available in High and Low tone versions. If you are using only one, go with the low tone. 12 volts. 3.5""×3.5""×2.5"".