iTeck Dock Input Cable 30 Pin to USB AF (for SyncCharge) 3.5mm Female Audio Input Convert your old dock into a universal charge station, and play audio too. Plug it into any pre-iPhone 5 dock station and charge up all phone, tablet, or portable devices in your house using the USB port. Plug your charge cable in and power up. Want music too? Just plug in the audio jack cable. Remember, any device, not just iPhones. IMPORTANT NOTE: This adapter cable doesnot work with your sounddock's remote controller, and doesnot work with digital sounddocks.