Professional version of the Arduino Mini Pro is a micro controller circuit board. It has 14 digital input/output pin (six of them can be used as a PWM output), 8 analog input, a 16 MHZ resonator, a reset button, the installation hole lead foot.
Technical parameters:
1. 14 digital input/output port RX and TX, D2 ~ D13,
2. 8 analog input port A0 ~ A7
3. 1 to the TTL level a serial port to send and receive port RX/TX
4.6 a PWM port, D3, D5, D6, D9, D10, D11
5. Using Atmel Atmega328P - AU microcontroller
6. Support serial download
7. Support external 3.3 V ~ 12 V dc power supply
8. Support 9 v batteries
9. 16 MHZ clock frequency