Description:
  This digital amplifier plate adopts TPA3116D2 chip.
  Configured with advanced modulation systems.
  Bluetooth transmission distance is about 10 meters.
  Transmission distance will be different due to different environment.
  If you want DIY a sound box, it's better not to use a material that has a blocking effect on the bluetooth signal.
  Its high integration reduces the number of components and integrates the natural protection circuit, including overpressure, undervoltage, overheat, DC detection and short circuit protection.

Parameters:

Instruction:
1. About the key switch
Mode: bluetooth, U disk, TF card switching mode
Play: play/ pause mode
Prev./V -: Short press to switch to "last song", long press for volume decline
Next/V +: Short press to switch "the next" song,  long press for volume increment.

2. About operation:
If the module is energized, the indicator on the module is green with a flash of blue, which is default as bluetooth mode. Turn on the Bluetooth of your phone or car. Both successful and disconnection will have a voice prompt, which will give priority to bluetooth selection. When access to the U disk or TF card will give priority to them , there will also be voice prompt.

Product Details:

1. Tested by ICStation's Outstanding Partner arduinoLab:

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

2. Tested by ICStation's Outstanding Partner Csongor Varga:

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

3. Tested by ICStation's Outstanding Partner The Tech Boy:

Buy the followings for the same project:

MT3608 Power Modules

TP4056 Charging Module

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