All  these  MP3 modules structure can be  Customized
1.Support USB 2.0 ,SD CARD,
2.Music format :Mp3 ,WMA,WAV
3.4pcs button on pcb:
 MODE /MUTE/REPEAY/EQ/VOL_/CH_/PLAY/PAUSH/VOL+/CH+
4.Bluetooth device name for mp3 module
5.Bluetooth module information ：follow the rule of bluetooth 2.1+EDR,compatible bluetooth version 3.0 & below version
                                                    support L2CAP/A2DP(AVCTP/AVDTP/AVCRP) to receive the stereo audio signal
6.support FM :87.5-108MHZ
7.LED display Size  40*18mm
8.Power input :Dc12V OR 5V