This 1-DIN Bluetooth car radio sets new standards in audio performance and connectivity. And yet it's easy to use. Built-in Bluetooth enables secure, hands-free calling and wireless music streaming from your smartphone. Thanks to Pioneer's unique Advanced Sound Retriever technology, the sound quality when played is as close as possible to the original recording. You can even connect two Bluetooth phones at the same time. Simply connect your Apple or Android* smartphone wirelessly via Bluetooth and enjoy Spotify (both Free and Premium) or use Pioneer's Smart Sync app. Don't be fooled: the DEH-S520BT is a true high-end car stereo. It plays FLAC files and offers 13-band graphic EQ and an integrated MOSFET power amplifier with 4 x 50 watts. You can easily connect a subwoofer and/or other amplifiers with additional speakers via the 3 RCA preamplifier outputs.