In addition, a 3.5mm audio jack or XH2.54-2P speaker output can be used for audio output.
With this shield, you can build a more powerful and flexible voice product that integrates Amazon Amazona voice services, Google Assistant, and more.

Note:After plugging in speaker module, the status of RGB LED is not stable; however,the status is normal when testing RGB.

Features

Support the Raspberry Pi 3B

Two microphones (Mic L and Mic R)

Two Grove connectors

One User-defined button

3.5mm audio interface

XH2.54-2P audio output interface

Interface Explanations

1. Button: default connected to GPIO17

2. Mic L and Mic R: microphone (labeled LEFT and RIGHT)

3. **RGB LED:**three APA102 RGB LEDs, connected to the SPI interface of Raspberry Pi.

4. WM8960: Low Power Stereo Codec

5. Raspberry Pi 40 pin header: support the Raspberry Pi Zero, Raspberry Pi 3B and Raspberry Pi 4B.

6. POWER: Micro USB port that powers the ReSpeaker 2-Mic Pi HAT. Power the circuit board to supply enough current when use the speaker.

7. I2C: Grove I2C port, connected to I2C-1

8. GPIO12: Grove digital port, connected to GPIO12 and GPIO13

9. XH2.54-2P SPEAKER OUT: connecting speakers, XH2.54-2P connector

10. 3.5mm audio jack: connecting headphones or speakers with 3.5mm audio plug

Note:The experiment is done with Raspberry Pi 3B. Yet other versions of Raspberry Pi may not be compatible.

(Not support Raspberry zero)

Tutorial  https://docs.keyestudio.com/projects/KS0314/en/latest/docs/KS0314.html#interface-explanations