Best Bluetooth car stereo units for your smartphone
It combines audio sources like your music player app, podcast and audiobook reader or navigation app in one single "hub", and lets you choose the input source, change tunes and set radio stations, and can even read text messages out loud for you through the car speakers, all without fumbling with the (typically) clunky head unit controls on the dashboard, but quickly picking stuff up from your familiar Android or iOS app interface.
As for features, it has all the usual bells and whistles like Bluetooth music output and calling, separate noise-canceling mic, USB port for charging/connecting, iPhone/iPad control compatibility, Pandora streaming and so on. The head unit also offers the hearty 7-band equalizer split from roughly 20 to 20,000 Hz of audible spectrum, and you get 17 actual watts of RMS per output channel, which, if used with good speakers, will make for a nice replacement of your often crappy stock stereo.
3. Pioneer FH-X700BT In-Dash Double DIN CD/MP3/USB Car Stereo Receiver w/ Bluetooth, Pandora Link, MIXTRAX & iPod Support ($129.99)
Not much more that you'll need, and the unit offers great features for the price like Bluetooth for hands-free calling and audio streaming, a detachable face, bright screen, and USB 1A connection that will charge your modern big-screen smartphone quicker. For Apple device owners, there is a two-way iPod/iPhone control, too.