Voltage:12 V, Frequency:335/420 Hz, Sound Level:105-118 dB ,Dia:96mm. Vehicle Compatibility: Applicable for passenger cars, SUVs and commercial vehicles. Part Position: Car Interior. The FC4 universal horn from Bosch ensures maximum attention with penetrating harsh sound for long distances and an unobstructed forward propagation of sound. Long service life and reliable quality from materials which are resistant to rust and stone impacts. Minimal interference to other vehicle electronic components with the use of EMC protection (Electro-Magnetic Compatibility).