*FREE SHIPPING AND HANDLING TO USA *ESTIMATED DELIVERY TIME: 12-20 DAYS Voltage rating:12-24V Frequency:H=410±20 L=330±20 Sound Output:105-118 Super-loud disk horns. Not only do these horns looks GREAT set just behind the grill, they also provide you a tone much louder than stock to announce your presence. This is for a set of two (2)horns for 12V systems. Includes universal harness insuring both insure proper voltage/current, and ease of installation. These horns use a standard blade connector on the back. Rated at 118dB, these horns are nearly 7X LOUDER than a stock horn (@ 96dB) Each horn has a diameter of 123mm (4.8"")."