White Desktop Dock Charging Station + 30 pin USB Data Sync Charging Cable + USB Charger Adapter for iPhone 4/4S 100% Brand New and High Quality Connect the dock to your computer/laptop with the USB cable , then place your iPhone 4/4S in the dock to sync and charge the battery. Connect the dock to an electrical outlet using an Apple USB Power Adapter, then place your iPhone in the dock to charge the battery. Connect the dock to a stereo or speakers using an AV cable or a stereo audio cable to play music from iPhone 4/4S. Place your iPhone 4 in the dock and enjoy clear audio during speaker phone calls thanks to special audio porting.