A car phone is a phone that is specially designed for a car. It is not like a regular phone that you carry around in your pocket or purse. Instead, it is built into the car and stays there all the time.
You might think of a car phone like a walkie-talkie that you use to talk to someone far away. But instead of talking to a friend or family member, you can talk to someone over the phone.
To use a car phone, you need to have a special plan with a phone company, just like you would with a regular phone. The phone is connected to a power source in the car, so it can stay on all the time. You can make calls and receive calls just like you would with a regular phone, but you don't have to hold it to your ear because it is built into the car.
Car phones used to be very expensive and not many people had them. But now, most cars come with a built-in system that connects to your phone, allowing you to make and receive calls hands-free. This is much safer than talking on the phone while driving, because you can keep both hands on the wheel and your eyes on the road.
So, a car phone is a phone that is built into a car, and it allows you to make and receive calls while driving without having to hold the phone to your ear.