"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. Dimensions L x W x H in. 5 x 4 x 5, Hertz 530/680, Battery Type 12V, Chrome Plated Yes, Compressor Included Yes, Decibel Rating 118, Multiple Tone Yes, Portable No, Product Style Car, Works With 12V vehicles. 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"