Kenwood KMM-BT728HD Bluetooth Digital Media Receiver with built-in Alexa voice controls and HD Radio General Features: digital media receiver (does not play CDs) built-in Amazon Alexa built-in HD Radio tuner plays MP3, WAV, AAC, WMA, and high-resolution FLAC music files pair two phones for simultaneous hands-free calling and up to five for music streaming 1.5 line LCD display with variable-color illumination Bluetooth Features: built-in Bluetooth (version 4.2) for hands-free calling and audio streaming with dual phone connection Smartphone Features: Android control through Bluetooth iPod, iPhone, and iPad control through USB iAP2 support for Apple Music Pandora and Spotify control with iPhone and Android Audio Features: Drive EQ improves sound to compensate for exterior noise 13-band equalizer low-pass filter and sub level control Expandability: compatible with SiriusXM satellite radio tuner inputs: front and rear USB inputs, front AUX input outputs: 6-channel preamp outputs (4-volt front, rear, sub) Other Features and Specs: built-in MOSFET amplifier (22 watts RMS/50 peak x 4 channels) compatible with most factory steering wheel audio controls (adapter required) removable theft-deterrent faceplate multi-language display (English, Spanish) microphone included warranty: 1 year