CableJive dockStubz +, Dock Charging Adapter, Black dockStubz is a small adapter for your audio dock or charge station so you can dock with your case on. Go ahead, get the great waterproof case you want, dockStubz is designed to take the hassle out of charging your phone. Made for iPhone 4/4S and all other legacy 30-pin Dock iOS devices. The dockStubz Plus adapter includes charge conversion circuitry for older docks like the Bose SoundDock Series l, that do not charge while they are connected. Connect dockStubz+ Plus to your audio dock and connect your phone to dockStubz+ Plus and you will have audio AND charge. Connect your phone or tablet to your favorite accessories with your case on, like microphones, Card Readers, dock stations, audio docks & more with no data lost. Extra Power When connecting to passive 30-pin accessories, like the Composite AV cable or some automobile 30 pin dock adapters, the dockStubz+ also lets you inject power via a micro USB jack located on the side of the adapter. For a perfect experience, make sure to first connect dockStubz with the dock or speaker before you connect to the iPhone.