The Arduino Pro Mini is an ATmega 328 based microcontroller board. The board comes with built-in arduino bootloader.
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 8 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers.
The board can be connected to the PC using USB-TTL converter board.
This version of Mini runs on 5V and 16 MHz.
The board is supplied with header pins which you've to solder on the mini pcb .
USB TO TTL CONVERTER is required to connect MINIPRO to PC & upload sketches.