Bosch 0986AH0203 FC9 Disc Horn Set, (Box of 2) Attractive design from high-qualtiy, chromium -plated protectve grill suitable for visible mounting Long service life and reliable quality from materials which are resistant to rust and stone impacts Maximum funtional reliability with optimum quanlity diaphram and cntact points Powerful tone at 118 decibels Minimal interference to other vehicle electronic components with the use of EMC protection (Electro-Magnetic Compatibility)