Radtech 13-300 ProCable 3.5mm Male to 30-Pin Female Audio Adapter for Most 30-Pin Docks Connect any device with a headphone jack to most Apple-compatible 30-pin speaker docks A universal solution that allows portable devices to play their sound through most high-quality, iPod oriented speaker systems Provides an easy method for devices with failed amplifiers or speakers to remain functional Provides an easy method for devices with failed amplifiers or speakers to remain functional Molded strain relief at all junctions for durability and long life.