This HAT product is a major step forward for amateur radio operators integrating Raspberry Pi with digital applications.
You can read Julian’s (OH8STN) blog on this product. If you don’t follow Julian, I suggest you do. Julian specializes in portable, digital operation in the field. Sometimes in very harsh conditions. He covers his activities in great detail on both his blog and his YouTube channel.
Product information can be found on the NW Digital Radio website.