Specifications Product Type: Wi-Fi Development Board Model: ESP8266 NodeMCU (Type-C) Microcontroller: ESP8266EX Operating Voltage: 3.3V Input Voltage (USB): 5V USB Interface: USB Type-C Wi-Fi Standard: IEEE 802.11 b/g/n (2.4GHz) Flash Memory: 4MB Clock Speed: 80MHz (Up to 160MHz) Digital I/O Pins: 11 Analog Input: 1 (10-bit ADC) Communication Interfaces: UART, SPI, I2C, PWM Wireless Security: WPA/WPA2 Programming Support: Arduino IDE, Lua, MicroPython Operating Temperature: -40°C to +125°C