Product Introduction:
1>. Chip:CSRA64215
2>. Power Supply Voltage: 3.6-5V (compatible with lithium battery power supply or 5V power supply)
3>. Connection: VCC and GND are power supply pins; L,G,R connect with earphone; COM is the common port for key, and the other sise of the key connect with NEXT/VOL+, PREV/VOL-, PLY; M+ and M- connect with the positive/negative of microphone.                                                                                         

Connection Picture:

Please noted:
This item has been updated to a new version since Jan., 2019.

The modules appeared in the videos below are the old version. Real items will be as the same as the current product pics. Hope for your kind understanding.

Tested by ICStation's Outstanding Partner 12voltvids:

The Bluetooth Module is installed in the classic ghetto blaster as following, it works well.

Learn More Details in the Video:
(The language in the video is English)