The DEH-S6220 CD receiver features enhanced Audio Functions, Pioneer Smart Sync App Compatibility, MIXTRAX, Built-in Bluetooth, and SiriusXM-Ready. You can enjoy superior sound quality and full control of the Pandora experience in your car directly from the display of the receiver. You are able to give tracks thumbs up or thumbs down, bookmark a song so you can purchase it later, easily switch between your personalized radio stations, and view full track data and album art. Stay safe and obey local hands-free laws with built-in Bluetooth (HFP). Easily pair a Bluetooth enabled phone to the DEH-S6220 without having to go through complicated settings. When a registered Bluetooth device is in proximity to the receiver, the auto connection function automatically pairs the two units.