1. control switch - to lock or unlock the
buttons.
2. DC jack - you can insert power adapter
instead of batteries for indoor use.
3. line out / headphones / remote jack
(RP2512 only) - insert your headphones and
remote control here.
4. volume buttons - to adjust the volume.
5. st•mono - selects between stereo and
mono sound in FM radio; selects repeat
disc, repeat track and shuffle options in CD
mode.
6. program - enters preset mode in FM
radio; enters program mode in CD mode.
7. bass boost - selects bass boost options.
8. preset station / - selects preset
station in FM radio mode.
9. radio on•off - turns radio on and off.
10. fm tuning / - skip / search
backward and forward in CD mode; tune
backward and forward in FM radio.
11. stop - press to stop CD play, press
again to power off.
12. play/pause/seek - press to play or
pause CD playback; enters seek mode in FM
radio mode.
13. open switch - slide to open the CD door.