inputs.text: good idea - like idea device plug charge listening books car stereo alas first not fit well 3 cases tried connection poor must maneuver device get connection set gingerly maintain connection wife slide case slide bottom pain not work iphone 4 otter commuter case changed cases partially could use device not work well simple thin plastic case either got drehemel filed bottom plastic case ok admit determined get thing work well sort plug get better not really solid connection dare file even persevere though fm transmitter charger duo workswell ok apparently lacks strong signal find difficult get station play clearly sometimes resorted disconnecting transmitter listening book iphone builtin speakers hear ye hear ye iphone vendors figure almost everyone uses case iphone design plugs longer fit wider variety cases not rocket science fit great not use case take chances sound quality not expect much area lots radio stations live town 150000 barely passable wish worked betterbecause like idea