Sonfer SFPA 104 B Manual De Instrucciones página 16

To lock the player, slide the HOLD switch to the left in
the direction of the "HOLD>" symbol.
To unlock the player, slide the HOLD switch to the right
in the direction away from the "HOLD>" symbol.
● Music Playback Controls
Use the following controls during music playback
● Specifications
Memory
Audio Format Support
PC Interface
Plug and play support
Audio output
4GB
MP3, WMA
USB 2.0 Hi-Speed
Windows XP/VISTA
3.5mm Stereo (earphone)