Voltage regulator PCB
1. Digital screen
2. USB MP3 player module
3. Small simple & high quality
4. Remote control
Features:
1. Support EQ, single cycle, random choice
2. Support to switch external signals directly
3. Support IR remote control in 8 meter
4. Support USB&SD card switchover
5. Support MP3/WMA format
6. With electronic circuit board
Mainboard keys operation instruction
S1: (PLAY/PAUSE/RANDOM) Short press for play or pause circularly.
Long press for on/off random play function.
S2: (PREV/VOL-) Short press for LAST, long press for VOL-.
S3: (NEXT/VOL+) Short press for NEXT, long press for VOL+.
