The Pro Mini is a microcontroller board base on the ATmega328.  It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, an on-board resonator, a reset button, and holes for mounting pin headers.

A six pin header can be connected to an FTDI cable to provide USB power and communication to the board. The Pro Mini is intended for semi-permanent installation in objects or exhibitions. The board comes with headers, allowing the use of various types of connectors or direct soldering of wires. The pin layout is compatible with the Mini Arduino.

Features :

1. 8 analog input port: A0 ~ A7.
2. A pair of TTL level serial port transceiver : RX / TX.
3. 6 PWM port: D3, D5, D6, D9, D10, D11.
4. Use For Atmel Atmega328P-AU microcontroller.
5. Support serial download.
6. Support 9V battery.