AGPtek A50 User Manual page 7

2.Shuffle
Choose to turn on/off shuffle mode.
Please note: you can also find "Play music from"/"Repeat"/"Shuffle mode"
in "Setting">"Play Mode", whether you make changes in "submenu" or
"settings", the setting will work in Music, but not in video.
3.Sound Settings
"Equalizer", choose from the 7 sound effects, or choose "off" to turn off
equalizer.
Please note: you can also find "Equalizer" in "Setting">"Sound Settings",
whether you make changes in "submenu" under Music or "settings", the
setting will both work.
"Variable Speed Playback", adjust speed from -8(Slowest) to +8(Fastest).
"Volume limit", adjust the volume from 0(Min.)~30(Max.) with button +/-.
4.Add to playlist
Choose to add to the 3 playlists.
5.Remove from playlist
Choose to remove from the 3 playlists.
6.Sleep timer
Choose "Off" to turn off timer, or choose to set the sleep timer in 1-99
minutes.