20Pcs bluetooth 5.0 Audio Receiving Module Car Speaker Audio Power Amplifier Board Receiver Board Lossless Sound Quality MP3 Decoder Board

Types

NO

Button/interface

Features

Detailed operation

Button

1

ON/OFF

Bluetooth power on/off

Note that battery charging is not controlled by this switch. 
ON: Bluetooth starts to work and the blue light is on.
OFF: Bluetooth stops working.

2

BACK/V-

Previous/Decrease volume

Short press: Previous song
Long press: Turn down the volume.

3

NEXT/V+

Next /Turn up the volume

Short press: next song
Long press: Turn up the volume, note that there will be a beep sound when the volume is adjusted to the end

4

PLAY/STOP

Play/pause, Answer/Hang up

During Bluetooth music playback, short press to control music playback or pause.
When the phone calls, short press to connect the phone, and short press again to hang up.

Interface

5

MICRO USB Power

MICRO USB power supply 5V

It can also be powered through the back pad 5V and GND wire.

6

B+ B-

Lithium battery powered

Really realize charging and discharging at the same time, the battery can be directly charged through the USB power supply.
Bluetooth can continue to work normally during charging. (B+ B- do not reverse)

7

Headphone jack

3.5MM audio output/call sending

The factory default is soldered on the Microphone, and the onboard MIC sends the call. Note that the pads in the two boxes cannot be tinned at the same time. If the headset does not have a microphone, the audio connector is a three-segment layer, and the solder pad on the back of the module Microphone box is tin. At this time, the onboard MIC sends a message.
If the earphone is equipped with a microphone, that is, the audio connector is a four-segment layer, the tin is placed on the pad in the Earphone box on the back of the module. At this time, the microphone on the on-board headset sends a message.

8

Microphone

Call delivery

9

Microphone Earphone

Call mode selection

10

MUTE

Amplifier board mute control interface

The high and low levels can be selected through the resistor next to the MUTE interface. Default H, high level output.
When the resistance welding pad on H is output high level, that is, when there is sound output, MUTE is high level 3.3V, when there is no sound output, MUTE is low level 0V.
When the resistance welding pad is on L, the output is low level effective, that is, when there is sound output, MUTE is low level 0V, when there is no sound output, MUTE is high level 3.3V.

11

Souand Card

Computer sound card function

Not used by default Tin the pads in the two boxes corresponding to the Sound Card on the back of the module. At this time, it can be used as a sound card by connecting it to the USB port of the computer through the USB cable. That is, the sound played by the computer is output through the audio interface of the module.

Indicator Light

12

Charging status indicator (red)

Charging status indicator (red) Battery level indicator (yellow)

(1) Separate USB power supply: The red light flashes, indicating that the power supply is normal.
(2) Separate battery power supply: the yellow light is always on, the battery power supply is normal; the yellow light flashes, the power is low.
(3) Connect USB and battery at the same time: red light flashes-battery is charging; red light is always on-battery is full

13

Battery level indicator (yellow)

14

Bluetooth indicator (blue)

Bluetooth indicator (blue)

After the module is powered on, turn on the switch.
At this time, the blue light flashes quickly, indicating that it is waiting for connection;
The blue light is always on after the connection is Play the song, at this time the blue light flashes slowly