Arduino Pro Mini 5V
Arduino Pro Mini is a compact yet powerful Arduino development Board. It works on the same ATmega328 microcontroller like UNO but is only 1/3rd of the size of UNO. The size is reduced by removing in-built programmer and the USB port, so pro mini requires an external programmer (FTDI board) to program it. The small size enables the board to be used on a PCB and other final applications.
Apart from size the specification of pro mini (5V) and UNO are almost similar and hence they both can exchange the same program.
Note: This version of Pro mini is 5V