Head unit

Function

The head unit provides a user interface for the vehicle's information and entertainment media components: AM/FM radio, satellite radio, DVDs/CDs, cassette tapes (although these are now uncommon), USB MP3, dashcams, GNSS navigation, Bluetooth, Wi-Fi, and sometimes vehicle systems status. Moreover, it may provide control of audio functions including volume, band, frequency, speaker balance, speaker fade, bass, treble, equalization, and so on. With the advent of dashcams, GNSS navigation, and DVDs, head units with video screens are widely available, integrating voice control and gesture recognition.