The ESP32-WROOM-32E is a series of powerful, power-efficient, cheap microcontrollers developed by Espressif Systems company in China and it is manufactured by TSMC (Taiwan Semiconductor Manufacturing Company). The ESP32 series consist of a Tensilica Xtensa LX6 32-bit, dual-core microprocessor running at 240MHz max and includes 2.4 GHz Wi-Fi and dual-mode Bluetooth combo chip with built-in antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management modules. ESP32 is a successor to their previous ESP8266 microcontroller module.
For Pin Layout and specifications of the Espressifs 32-WROOM-32E module see the Datasheet ESP32-WROOM-32E
The ESP32 DEV Kit C V2 from “Joy-It” is one of the many models developed around the ESP32 Woom32 chip. It contains a voltage regulator, a USB programming circuit for the ESP32 chip and some other functions. Fore more detail see datasheet