JBL OnBeat 30-Pin iPod/iPhone/iPad Speaker Dock (Black) Dual Phoenix full-range transducers with computer-optimized DSP equalization deliver legendaryJBL sound Docks with iPod, iPhone and iPad with rotating dock connector to orient iPod and iPhone screens in portrait or landscape mode for optimal viewing Composite video output connects to TV for big-screen viewing USB connects syncs and charges devices when connected to the iTunes music library