Feature:For use with ANY 12V vehicleSpecifications:Loudness factor: 110dBPowered by: vehicles' electricity -- 12V / 4APower : About 48WFrequency: H 510 ?�� 25Hz ， L410 ?�� 25Hz[both of them have same tone]Colour: red and blackDimensions [aprox]: 12 x 8.7x 6.5cmPackage includes:1*410Hz Horn Number1*Attachment screws