2PCS 300DB Super Loud Train Horn, Mini Size&Big Sound, Car Air Electric Snail Double Horn, 12V Waterproof Air Horn Replacement Kit, Automotive Accessories Universal for Car, Motorcycle #Black

Only needed 1 but was good to have the option for a high or low sounding horn. Easy to install, just as the factory horn.

The decibel scale is logarithmic, which means that for every increase of 10-decibels = 10 dB, the associated power increases by a factor of 10. For example, an increase of 30-dB = (10 + 10+10)dB implies that the power has increased by a factor of 1000 = 10*10*10. Hence, a horn that emitted 300 dB of sound implies a power output of 10 raised to the 30th power, i.e., 1,000,000,000,000,000,000,000,000,000,000.That is absurd. A very loud sound, such as a gunshot at close distance or a fighter jet at moderate distance, has a characteristic sound level of 140-180 dB, again depending on distance.Hence, the claim of 300 dB immediately implies that the manufacturers don't know what they're talking about. At best, they are confused. At worst, they are lying.