Front USB direct connection: USB 2.0 (full speed)
Take your favorite MP3, WMA and AAC files for a ride. New Pioneer headunits have a front USB terminal to directly connect a portable media player, USB device or other USB-compatible gear, so you can play in your car whatever youve recorded via PC. Its fast and easy. No adapters are required. (Please use CD-U50E USB extension cable if a direct connection causes a USB device to protrude from the headunit in a way that can interfere with driving.)
Direct connection for iPod and iPhone (CD-IU50 required)
Pioneers new headunit is ready to roll with capability for direct connection to iPod nano, iPod or iPhone. File search and access are extra-quick. The headunit keeps song, artist, time and album information displays very clear and user-friendly. (Does not apply to iPhone.)

Advanced Sound Retriever
Hear the glory of original sound across a deeper, wider spectrum from highly compressed MP3, WMA and AAC files stored on USB device, iPod and portable media players. By compensating for data (especially higher frequencies) that tend to get lost in the digital compression process, Pioneers Advanced Sound Retriever technology enhances audio reproduction nearly all the way up to 20 kHz frequencies. We can make your music sound close to CD quality.  
EEQ 7-band digital graphic equalizer
Sound shaping is at your command. You can adjust the sound according to in-car acoustic characteristics and the music you listen to.

Rotary Commander
Next to the Rotary Commander on the new DEH-P5150UB sits a large LIST key for extra-quick, easy file search and access. Press it to display folder or file lists, rotate the commander dial to search, then press the commander button for playback. Direct Sub Drive

Wired remote control input
Since entertainment shouldnt compromise driving safety, Pioneer engineered this feature for cars with factory-equipped remote control installed on the steering wheel to give drivers more convenient control of a Pioneer headunit without having to take their hands off the wheel.
Multi-language display (English/Spanish/Portuguese)    
3 RCA pre-outs (front + rear + subwoofer)
Spectrum analyzer
Bluetooth adapter ready