processor: ESP8266 80MHz 3.3V logic/power flash memory: 4MB of FLASH (32 MBit) board regulator: 3.3V 500mA, however 250mA current consumption is recommended so the regulator does not overheat. The regulator can be disabled by connecting the ENable pin to Ground. GPIO pins: 9 pcs (SPI, I2C) GPIO I/O voltage: 3.3V 12mA per pin 1 analog input pin A (ADC) 1.0V maximum WiFi: ESP8266 WiFi module, 2.4Ghz, 802.11 b/g/n USB 2.0 connector: microUSB 5V reset button charging connector (jst phr-2), which can be connected to a 4.2/3.7V Lithium Polymer (Lipo/Lipoly) or Lithium Ion (LiIon) battery. Charge current 100mA when power is taken from USB. Check battery polarity, as a reversed battery will damage the board. board dimensions: 51 x 23 x 8 mm weight: 6g includes 2 pcs 16-pin header link: https://cdn-learn.adafruit.com/downloads/pdf/adafruit-feather-huzzah-esp8266.pdf
