"The Wolo Bad Boy Chromed Air Horn leaves no doubt that you have arrived on the scene. This powerful dual-tone air horn is twice as loud as a factory horn. Works With 12V vehicles, Multiple Tone Yes, Hertz 530/680, Decibel Rating 118, Product Style Car, Battery Type 12V, Compressor Included Yes, Dimensions L x W x H in. 5 x 4 x 5, Chrome Plated Yes, Portable No. Powerful, dual-tone air horn is twice as loud as factory horn Compact 1-pc. design fits most 12V vehicles Maintenance-free compressor Includes bilingual installation instructions"