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This is WeMos LOLIN32 V1.0.0 based on ESP32 Rev1 Wifi Bluetooth Board. The board design is basically perfect. It takes more than a little inspiration from Adafruit’s Feather series.
It has 4 MB flash memory onboard, a USB-serial adapter (cp210x), and a LiPo battery charger and connector. All the relevant pins are broken out and well-labeled, especially on the bottom. It has a nice central reset button, and even a single user LED for your blinking pleasure.
For the price, it has one more feature (the LiPo) than we’d ask for. It even (barely) fits into a standard breadboard. Can’t beat that with a stick. No wonder they stocked out in the first week.