Features High-excursion dedicated 6-inch subwoofer provides deep, accurate bass Two powerful 6-inch coaxial drivers deliver clear vocals & crisp highs Play your iPod/iPhone music while charging using the USB (Universal Serial Bus) to 30 pin Apple cable Using the rotary dial & front facing screen, play & control music directly from storage devices including USB (Universal Serial Bus) flash & external hard drives Padded aluminum handle provides protection & premium feel Input options let you connect most audio devices & mix with an instrument Specification Speakers: Two 6-inch coaxial drivers plus subwoofer Inputs: USB (Universal Serial Bus) (iPod/iPhone with included 30 pin cable) 3.5mm audio jack (cable included) Auxiliary audio jack for instrument & mix AM/FM with 5 presets Power Output: 35 Watts RMS. Power Source: 12 &0D&0 batteries (not included) AC power supply Made for iPod touch (2nd generations), iPod classic, iPod nano (2nd, 3rd, 4th, & 5th generation), iPhone 3GS, & iPhone 3G/4.