Built-in Bluetooth technology for hands-free talking and audio streaming Power output: peak: 50 watts x 4 channels/ RMS: 17 watts x 4 channels 3. 5mm Front Audio auxiliary input/ Front USB Input/ 1 sets of 2. 5V preamp outputs (front, rear and subwoofer) Pandora/Spotify/iHeartRadio control via Bluetooth/ compatible with Apple iPhone 6/6+ and iOS 8 software Theft-deterrent, detachable face plate/ CD text information display/ MP3 ID3 tag display (title/artist/album)