Hello! This TechForum post is dedictated to to some helpful links as well as addressing your questions regarding ReSpeaker (1597-1405-ND)
View the Blog video here:
eeWiki page here: eewiki - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
ReSpeaker Part Page: https://www.digikey.com/short/q7vwr0
PUI Exciter Part Page: ASX10108-SPD-R / 668-1584-ND
Datasheet - https://media.digikey.com/pdf/Data%20Sheets/Seeed%20Technology/102010088_Web.pdf
Maker Minute Video - SEEED ReSpeaker
ReSpeaker website - http://respeaker.io/