Features: Wireless 802.11 b / g / n standard Support STA / AP / STA + AP three operating modes Built-in TCP / IP protocol stack to support multiple TCP Client connections (5 MAX) D0 ~ D8, SD1 ~ SD3: used as GPIO, PWM, IIC, etc., port driver capability 15mA AD0: 1 channel ADC Power input: 4.5V ~ 9V (10VMAX) Continuous Current: ≈70mA (200mA MAX), Standby: <200uA Transfer rate: 110-460800bps Support UART / GPIO data communication interface Remote firmware upgrade (OTA) Support Smart Link Smart Networking Working temperature: -40 ℃ ~ + 125 ℃ Size:As Picture Shows Package Includes: 1PC*NodeMcu LUA ESP8266 CH340G WIFI Development Board Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.