NodeMCU ESP8266 Development Board with 0.91inch OLED Display

Description
WIFI Kit 8 is a cost-effective Internet development program of things, the main chip using ESP8266, with CP2014 USB to series chip, lithium battery interface and charging and discharging circuit, 32 MByte Flash, WIFI antenna, 0.91 inches OLED display.
it can be programmed for Arduino and NodeMCU environments. the operation is consistent with NodeMCU.
leads all the pins of ESP8266

Features
The main chip using ESP8266, with CP2014USB to serial chip, lithium battery interface and charge and discharge circuit,
32MByte Flash, WIFI antenna, 0.91-inch OLED display.
Working voltage: 3.3V ~ 7V
12 digital pins can be configured to read, write, IIC, SPI, medium, PWM and other functions
1 AD input