The AIY Voice Bonnet comes with the AIY Voice Kit V2 by Google—a do-it-yourself intelligent speaker. The Voice Bonnet connects to your Raspberry Pi to create a natural language processor that can respond to your voice and connect to the Google Assistant.
The bonnet includes hardware to facilitate audio capture and playback, stereo speaker terminals, a headphone jack, an 8-pin button connector, UART breakout pins, and 4 unique GPIO pins called `PIN_A`, `PIN_B`, `PIN_C`, and `PIN_D`.