I didn't realize it was equipped with an ESP32-C5 with the Japanese technical standards mark. This was a pleasant surprise, as I was planning to remove it and replace it with one that did. Technical standards are a pain in Japan, so it's difficult to select a module with wireless capabilities. This manufacturer's P4 module does not have wireless capabilities, so it seems easier to use. It seems that other manufacturers also have P4 boards with 32MB of flash, but I wonder if they plan to expand their lineup.