Apollo23 - USB Charging Dock, Data Sync Docking Station with 3.5mm Line Out for Apple iPhone 4S 4 4G, Pink Charge and sync your iPhone with this Charging Dock for fast data transfer 16mm width slot allows your iPhone to be charged with protective case (fit most iPhone case) Your iPhone sits upright in the dock as it syncs or charges, perfect for a desk or countertop Audio line out port allows connections to powered speakers Could be connected to 3.5mm audio cable to play music via sound box