iBOLT Dock'n Play cable for Samsung Galaxy phones designed to connect sound from Apps to car-stereo speakers, for Samsung S4, Note 3 and S3 The 9ft Dock'n Play cable from iBOLT triggers DockMode in any Samsung Galaxy S4, S3, Note 2 or Note 3. Activate under &gt;Settings &gt;Accessory &gt;Check All Boxes By downloading and installing the iBOLT Dock'n Drive application from the Google Play store, the phone can also be set to turn on/off Bluetooth and WiFi automatically when the cable is inserted. Highly useful for both home and car use. Always keep volume at max on the phone and regulate volume on the stereo for optimal sound quality.