A new head unit is your megacar entertainer the first came in the scale of a TV and now we see a much sophisticated one in the vehicle. The 1st ones used vacuum pumps but the advancements in the radio is thanks to the improvements in the field of electronics. They have changed many things in human life. There are both meritorious and disadvantageous part related to the radio. It the only source of entertainment to the car drivers. And important reports can be spread to them more fast than any other method. Without the radio the driving will be stressful and unimaginable.