Good seller. Fast shipping and well packed. Please note that the "blue-yellow" version of the OLED is a actually monochrome screen with a top bar of yellow color and blue in the rest.
Nice item, essentially an ESP32 with a power board tacked on. There is no Voltage reader on this board, so it CANNOT read the battery voltage. Seller wasn't understanding me, so I assume that's not support, unlike the TTGO version .