WeMos D1 R2 WiFi ESP8266 Development Board for Ard-uino UNO Program - Product Features
- Microcontroller: ESP8266EX. Operating Voltage: 3.3V
- Digital I/O Pins: 11 (all I/O pins have interrupt/pwm/I2C/one-wire capability, except for D0)
- Analog Input Pins: 1 (3.2V max input) , Input Voltage Range: 9V to 12V
- Flash Memory: 4MB , On-Board Switching Power Supply
- Output: 5V at 1A Max , Board Dimensions: 68.6mm x 53.4mm (2.701\" x 2.102\") / Long x Wide