Features: Made from high-quality PCB material, the mini D1 PRO offers enhanced performance and expanded features for a seamless development experience. 11 digital input/output pins, all with interrupt/PWM/I2C/A cable support (excluding D0). All IO pins operate at 3.3V, except for D0, and all IOs support interrupt/PWM/I2C single-line communication. Develop the SP8266 module using the universal ESP8266 Development Module in the development board manager. With its compact size and user-friendly interface, the mini D1 PRO is the ultimate tool for bringing your creative ideas to life. Specifications: Item: D1 Mini Pro Minimum ESP8266 Wireless Network Card 11 digital input/output pins, all with interrupt/PWM/I2C/A cable support (excluding D0) Micro USB connection Compatible with Arduino, programmable with Arduino IDE 1x ADC pin (input 0-3.3V) Supports OTA Built-in 5V1A switching power supply Size: Approx. 34.3x26.5mm/1.35x1.04in Note: Please allow 1-2cm error due to manual measurement, ensure you don't mind before ordering. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 pc Mini D1 PRO Development Board