3pcs M18 Wireless Bluetooth MP3 Audio Receiver Board BLT 4.2 mp3 Lossless decoder Bluetooth 4.2 Audio Receiver Board Wireless Stereo Sound Module

Function Description:
Bluetooth V 4.2 version, support Bluetooth automatic connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual channel output.
After the module is powered on, the mobile phone searches for the Bluetooth name M18/M28/M38, and can play music after connecting Bluetooth.
Module blue indicator light:
When the Bluetooth is not connected, the indicator light flashes quickly;
When the Bluetooth connection is on, the indicator light is always on;
When the Bluetooth is playing, the indicator light flashes slowly.

M18(HW-425):

PIN-------Description
KEY------Button control terminal (4 button functions, additional resistors such as wiring diagram)
MUTE---Mute control terminal (output high level 3.3V when muting, output low level during playback)
VCC-----Positive power supply 5V (lithium battery 3.7V power supply requires short circuit diode)
GND-----GND
L-----------Left channel
R----------Right channel
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Package Includes:
3 * M18(HW-425) Wireless Bluetooth MP3 Audio Receiver Board