Bluetooth is a short-range wireless technology standard used for exchanging data between fixed and mobile devices over short distances,

By integrating this wireless functionality into your car stereo, you can hear callers’ voices over your car speakers, see incoming call information on your stereo’s display, and possibly stream audio from your device to your stereo. Some universal Bluetooth adapters require no interaction with your car stereo. Most importantly, you can keep your eyes on the road and hands on the wheel while talking to callers.

Many Bluetooth devices also make it possible to stream music from a Bluetooth capable smartphone, tablet, or other device to your car stereo.