you can also get it on some car stereos. Auxiliary input adapters, music and phone calls will come through your car's speakers, but you will have to pick up the iPhone or iPod to select or control music playback. You have to install the auxiliary connection. However, these kits can cost as much as a replacement stereo, and may require professional installation, adding to the cost.
3 Ways to, hook Up an iPhone to a Car Stereo - wikiHow
More advanced units include Bluetooth audio streaming, letting you also play music from an iPhone to the Bluetooth unit. There are different varieties available, but youll want one that connects to your iPhone7 via Bluetooth.5mm is a bit annoying due to the extra adapter that youll need and the lack of concurrent charging. However, you will still need to use your iPhone to select music. The ambitious project of apple, called CarPlay, implants some of the iPhone 7s main applications in cars so drivers can control them with voice commands, a touch on the steering wheel or a swipe on a display screen in the dashboard. With iPhones, you can not only play music, but also make hands-free phone calls and use navigation. Modern head units can be had with built-in Bluetooth support, which will support hands-free calls and music streaming from an iPhone.