We pull the final board from the top of the Show, and find the expected hardware—buttons, lots of microphones, and some ADCs to funnel your voice from the microphones to the CPU:

Texas Instruments TLV320ADC3101 92 dB SNR Low-Power Stereo ADC (x4) as seen in the Echo and Echo Dot

Knowles MEMS Microphone (x8)

Switch (x3)

Fun fact: all that foam tape minimizes vibration noise so that Alexa still has a chance of hearing you during loud music sessions.