A mobile terminal having acoustic transducers and method for using the same are provided. The interface board has its inputoutput ports paired as port groups. In another aspect, the methods and systems select content for outputting on a mobile device during a program break in an Internet television stream using mobile device trajectory information. Optionally, de-emphasis contribution of a first driver, a second driver and a third driver to an output is controlled based, at least in part, on the first control voltage, the second control voltage and the third control voltage, respectively. The optical module component includes a mounting component, a semiconductor optical device, and an optical transmission medium.