The microcontroller of this board is ATmega 328P-mu. The microcontroller of the original ARDUlN0 pro mini is ATmega 328P-AU. The performance and function of these two IC is same because of the same silicon core of IC while the only difference is there figure. The power IC of our board is AMS1117. The max input voltage of this IC is 15V DC while the original board is 12V. The max output current of this IC is 800mA* while the original board is 500mA. It can be used for more devices as power supply. Some simple application can operate without any other power IC.
There are 20 pins can be used as digital I/O, of which have 5 multiplexing pins. There are 8 pins can be used as analog inputs, of which have 5 multiplexing pins.