The Micro Pro uses the same ATmega32U4 processor as used on the Leonardo boards. The board has a Type-C connector and the USB interface is contained within the ATmega32U4 chip and does not require a separate USB chip like most Arduino boards which helps to keep the size small. The board also does away with the reset button and ICSP header to minimize the footprint. If it is necessary to reset the board, the reset pin should be momentarily grounded. The board operates at 5V which can be supplied via the Vcc pin or through the USB port connection. If an external 7-12V power supply is used, the power should be input on the ‘RAW’ pin which feeds an on-board 5V regulator. It is not recommended to use input voltages greater than 12V as it will cause the on-board regulator to work harder and may cause it to overheat. There is a green power LED on the board and 2 red LEDs which show activity on the TX/RX lines. There is no on-board general purpose LED. Like all Arduino and compatible boards, it can be programmed using the Arduino IDE via the USB port. To program with the Arduino IDE, use board type: ‘Leonardo’. The board comes with 2 male header strips. These do not come soldered for maximum flexibility depending on how the module will be used. The headers can be optionally soldered onto the module if using with a breadboard. If it is desired to solder on the headers, it is easiest if the headers are first placed into a solderless breadboard to hold them aligned while they are being soldered.