CD/DAB/FM/USB/iPod/ Audio In/ Line 94 mm Cone Woofer, 50 mm Dome Tweeter iPod/iPhone Charging Sound Control (Bass/ Treble) Sound Equalizer with 4 Presets (FLAT, JAZZ, POP, ROCK) Bass Enhancer P-BASS Class D Amplifier (Digital Amplifier) Power Output: 15 W + 15 W (1 k Hz, 10 % THD, 8 ohms)