Nextar Digital MP3 Player - Manual (Page 7)

notice : Never unplug the USB cable during data transmitting to avoid any failure to the player; after data
transmitting, please do not disconnect the player from PC until “Device can now be safely removed” appears; while
using USB function, all other buttons will be
nonfunctional. Refer to the FAQ for any lost files, I/O
Buttons and functions
1 A-B/REP
2
Play/Pause/Stop
3 M button
4 REC