Super Loud Compact Car Blast Tone Air Horn Kit 110DB 12VSuper Loud Compact Car Blast Tone Air Horn Kit 110DB 12V A pair of 2 HIGH: 400Hz LOW: 330Hz Car horn kit Includes 1 piece high note horn,1 piece low note horn,mounting bracket iron sheet,wiring harness set with relay and fuse,horn button. The relay adopts pure copper coil, pure copper contact and leather pipe harness to facilitate the connection of required equipment. With button, it can be installed separately