Bluetooth audio streaming w/Simple Secure Pairing Convenient One-Touch listening with NFC technology App Remote with voice control for select smartphones CD Player Voice Control Siri Eyes Free and Android Sound Synchronized Illumination High Pass/Low Pass Filter: 80/100/120 High Voltage Pre Out: No Front USB/AUX Input USB MEDIA TRANSFER PROTOCOL: Yes USB ANDROID OPEN ACCESSORY PROTOCOL : Yes (2.0 EXTRA BASS: Yes (1,2) DSO (DYNAMIC STAGE ORGANIZER): No OUTPUT POWER: 4 x 55W PRE OUT: Rear+Sub SUB OUT: Yes Subwoofer Direct Connection 18FM/12AM Presets RDS: Yes Key Illumination: Yes LCD Display Built-In Microphone Product highlights: CD receiver with AM/FM tuner plays CDs, CD-Rs, and CD-RWs, including discs loaded with MP3, WMA, and FLAC files Sound Synchronization pulses lighting in time to your music remote control Bluetooth Features: voice control with iOS and Android phones NFC offers instant Bluetooth pairing with compatible phones dual-phone Bluetooth hands-free calling and audio streaming Smartphone Features: (see Details for info on compatibility with specific smartphones and apps): built-in iPod, iPhone, and iPad control AOA 2.0 Android connection compatibility Siri Eyes Free with compatible iPhones, voice control with select Android models Quick-BrowZer and Jump Mode search features Audio Features: EQ10 10-band equalizer high- and low-pass filters Extra Bass boost Expandability: inputs: front panel auxiliary and USB inputs outputs: 4-channel preamp outputs (2-volt rear/subwoofer) Other info: built-in amplifier (17 watts RMS CTA-2006/55 peak x 4 channels) compatible with most factory steering wheel audio controls (adapter required) detachable face with blue key illumination