Standard Raspberry Pi Pico header, supports Raspberry Pi Pico series ^^ Standard 3.5 mm audio jack, for connecting external headphone ^^ Dual channels speaker headers, for direct driving speakers. 8~384000Hz audio sampling rate ^^ Stereo sound effect output. Using 3-wire I2S, effectively reducing EMI ^^ Comes with development resources and manual (Raspberry Pi Pico audio play code, sound card code)