1/2/5/10pcs 16MHz 5V Pro Micro ATmega32U4 Replace Pro Mini ATmega328 For Arduino
With 16Mhz crystal. Supported under Arduino IDE v1.0.5. he USB port is also available in single row pin strip to connect a USB cable (Host) to connect other Devices. Pin Size : 3cm X 1.2cm / 1.18"X0.47".