MaxBlast Stainless Steel Trumpet 12V Horn - DualMaxBlast Dual Trumpet Horn is constructed of durable stainless steel. When installed, the trumpet should point slightly downward to permit water drainage. Specifications:. Stainless Steel. Dual. 12V. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.