The Geepas GMS8539 2.0-Channel Professional Speaker System with USB and SD Card Slots is ideal for use with medium-sized TV sets or computer systems. You can independently adjust various aspects of the audio such as the treble, bass, microphone volume, and the master volume. The FM radio offers you endless entertainment with a wide range of songs.  You can listen to your own choice of music by using an SD card or USB enabled storage with the speaker system. This speaker system requires a voltage of 220-240V to operate.