Curtis MPS2015UKA - Manual (Page 9)

Buttons Operation
7
General
To Press
Turn On/Off
Scroll through lists
Select option
Return to Main Menu Hold the Play/Pause button
Hold the MODE button
Previous / Next buttons
MODE button
Music Play/Pause songs
Jump to next song
Fast forward
Move back to previous song
Fast backward
Display lyrics
Stop lyrics display
Volume up
Volume down
Hold the MODE button for 2 seconds
Hold the Next button
Hold the Previous button
Play/Pause button
Start recording Rec/Hold button
Next button
Previous button
MODE button
Vol+ button
Vol- button
Save the recorded file Hold the Play/Pause button
A-B Repeat Rec/Hold button
Stop A-B Repeat Play/Pause button
Have the device hold / unhold Hold the Rec/Hold button
Have the player hold / unhold:
If you want to have your player locked while enjoying music,
you can hold the Rec/Hold button, then all operations on buttons will be invalid.
And you can unlock your player by holding it long again.