M – Press to select or confirm; press and hold to exit to main menu. This button may perform other functions depending on menu opened.
EQ - Press to change audio equalizer mode while playing music
Direction Pad 
UP – to increase audio volume
DOWN - to decrease audio volume
RIGHT - to select next item in the menu
LEFT - to select the previous item in the menu
O- Play or Pause during the Music or Video mode
Music Mode
Press “M” to enter to Music mode
UP/DOWN to set the volume
< / > to move to previous or next music file
O to start playing the selected music or pause the music.
“EQ” to change and set equalizer mode
Press and hold “M” to exit to main menu
Movie Mode
Press “M” to enter to Music mode
UP/DOWN to set the volume
< / > to move to previous or next music file
O to start playing music or pause the music.
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