IV. FUNCTIONAL OPERATIONS AND FEATURES
1. LED Screen
2. Master Volume: In MP3/FM/AUX mode, use it to regulate volume output from the
speaker.
3. SD Port: Read audio files in MP3 format in SD card in capacity up to 32G (FAT32).
4. USB Port: Read audio files in MP3 format in USB storage device in capacity up to 32G
(FAT32).
5.
: In FM receiving status, short press it to select the previous channel after a full
station search has been executed.
6.
: In USB/SD card reading status, short press it to play/pause, or long press it to
select one of four playback sequencing modes (All - play all tracks in sequence; ONE -
repeat one track). In FM receiving status, long press it to execute a full search (it is rec-
ommended to execute at least one full search before using radio receiving function.
All founded stations will be saved even in power-off). In AUX input / FM radio status,
short press it to toggle between mute and normal volume.
7.
: In USB/SD card reading status, short press it to go to the previous track. In FM
receiving status, short press it to select the next channel after a full station search has
been executed.
8. Mode/SHIFT: short press it to toggle between USB/SD and FM receiving modes. long
press it to toggle between recording folder and MP3 folder.
9. Recording/DEL: Short press it to enable recording (USB/SD storage device need be
connected first). During recording, reverberation should be tuned to the minimum.
Long press it to delete a recording file. Recording in AUX or FM mode is available.
10. EAR MIC: headphone/MIC Port
11. LINE IN: External sound source input port (plug-and-play).
12. TREBLE: The control knob of treble
13. Reverberation: Microphone reverberation regulating knob.
14. Microphone volume: Microphone volume regulating knob.
