Radtech 13-300 ProCable 3.5mm Male to 30-Pin Female Audio Adapter for Most 30-Pin Docks
DockAdapt is a rugged, yet flexible cable that allows any device with a 3.5mm headphone jack to be connected to most any Apple-compatible, docking speaker system. With DockAdapt, you can connect any audio device with a headphone jack to a multitude of high-fidelity speaker systems designed for dock able Apple iPods.