Features Onboard ESP-WROOM-32 module Onboard CP9102X / CP2102, USB to UART converter USB port for power input, firmware programming, or UART debugging 2x19pin extension headers, breakout all the I/O pins of the module 2x keys, used as reset or user-defined Specifications WIFI module: ESP-WROOM-32 Processor: ESP32-D0WDQ6 Built-in Flash: 32Mbit Antenna: Onboard PCB antenna Peripheral interface: UART/GPIO/ADC/DAC/SDIO/PWM/I2C/I2S WiFi protocol: IEEE 802.11 b/g/n Bluetooth: Bluetooth 4.2 Frequency range: 2.4G ~ 2.5G (2400M ~ 2483.5M) WIFI mode: Station / SoftAP / SoftAP+Station Power supply: 5V Logic level: 3.3V Dimensions: 48.26mm x 25.4mm