Specifications:
Lowest cost WI-FI
Integrated low power 32-bit CPU
Arduino-like hardware IO
Upload codes from the Arduino IDE
Wi-Fi Module – ESP-12E module similar to ESP-12 module but with 6 extra GPIOs.
USB – micro USB port for power, programming and debugging
Headers – 2x 2.54mm 15-pin header with access to GPIOs, SPI, UART, ADC, and power pins
Flash Memory(Mb):4
Support:SDIO 1.1/2.0, SPI, UART
Length (mm):49
Width (mm):24
Height (mm):13
Weight (gm):8
Misc – Reset and Flash buttons
Power – 5V via micro USB port
Dimensions – 49 x 24.5 x 13mm