A mobile terminal, comprising: a terminal body (220, 320); a pair of acoustic transducers (232, 233, 332, 333) detachably mounted in the terminal body, each of the pair of acoustic transducers having a sound input and output unit configured to output sounds and configured to convert sounds into electrical signals and a main body part connected with the sound input and output unit and having a wireless communication module and a battery mounted therein; and a control unit configured to operate the pair of acoustic transducers as one of a wireless earpiece, a speaker, and a microphone, wherein the control unit of the mobile terminal comprises: a separation detection unit configured to detect separation of at least one of the acoustic transducers from the terminal body; a call signal detecting unit configured to detect whether a call signal is generated; and a controller configured to control the operation of the acoustic transducers according to signals received from the separation detection unit and/or the call signal detection unit, wherein the controller is configured to control, upon receiving a separation signal from the separation detecting unit, a sound volume of the pair of acoustic transducers for use as wireless earphones, and is configured to subsequently operate, upon receiving a call receiving signal from the call signal detecting unit while the acoustic transducers are used as wireless earphones, one acoustic transducer as a wireless earphone and the other acoustic transducer as wireless earphone and microphone or as a microphone. a terminal body (220, 320); a pair of acoustic transducers (232, 233, 332, 333) detachably mounted in the terminal body, each of the pair of acoustic transducers having a sound input and output unit configured to output sounds and configured to convert sounds into electrical signals and a main body part connected with the sound input and output unit and having a wireless communication module and a battery mounted therein; and a control unit configured to operate the pair of acoustic transducers as one of a wireless earpiece, a speaker, and a microphone, wherein the control unit of the mobile terminal comprises: a separation detection unit configured to detect separation of at least one of the acoustic transducers from the terminal body; a call signal detecting unit configured to detect whether a call signal is generated; and a controller configured to control the operation of the acoustic transducers according to signals received from the separation detection unit and/or the call signal detection unit, a separation detection unit configured to detect separation of at least one of the acoustic transducers from the terminal body; a call signal detecting unit configured to detect whether a call signal is generated; and a controller configured to control the operation of the acoustic transducers according to signals received from the separation detection unit and/or the call signal detection unit, wherein the controller is configured to control, upon receiving a separation signal from the separation detecting unit, a sound volume of the pair of acoustic transducers for use as wireless earphones, and is configured to subsequently operate, upon receiving a call receiving signal from the call signal detecting unit while the acoustic transducers are used as wireless earphones, one acoustic transducer as a wireless earphone and the other acoustic transducer as wireless earphone and microphone or as a microphone.