EZOPower Octopus Stereo Audio Speaker Charger Dock with Subwoofer for Apple iPhone 4, 4s, 3Gs, iPod Touch Nano and more Made for iPod, iPhone/ Licensed by Apple. Play music and charge iPod iPhone at the same time. Total power: Speakers 4W + Subwoofer 6W = 10W RMS, 20W Peak Power Amber LED power indication Additional 3.5mm audio port allows music source from MP3, CD Players, PC, Home Theater & other audio devices.