ATmega32u4 @ 8MHz with 3.3V logic/power
You also get tons of pins - 20 GPIO pins Hardware Serial, hardware I2C, hardware SPI support 7 x PWM pins 10 x analog inputs
3.3V regulator with 500mA peak current output USB native support, comes with USB bootloader and serial port debugging
Built in 100mA lipoly charger with charging status indicator LED Pin #13 red LED for general purpose blinking Power/enable pin 4 mounting holes Reset button
Measures 2.0'' x 0.9'' x 0.28'' (51mm x 23mm x 8mm) without headers soldered in Light as a (large?) feather - 5.7 grams

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2 inch
Height : 1 inch
Length : 3 inch

Item Weight: 3.04 ounce (View shipping rates and policies)
Shipping Weight: 3.04 ounce (View shipping rates and policies)

ASIN : B071HTMXCH