The Voice Bonnet comes with the AIY Voice Kit (V2) by Google—a do-it-yourself intelligent speaker. The Voice Bonnet connects to a Raspberry Pi Zero to create a natural language processor that can connect to the Google Assistant.
The bonnet includes on-board 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`.