Arduino Pro Mini 328

Features:

14 digital input/output port RX, TX, D2 ~ D13
8 analog inputs A0 ~ A7
1 pair of TTL level serial port transceiver port RX/TX
6pcs PWM ports, D3, D5, D6, D9, D10, D11
Using Atmel Atmega328P-AU microcontroller
Support serial download
Support external 3.3V ~ 12V DC power supply
Support power supply by 9V battery
16MHz clock frequency
Size: 33.5*18.0mm(approx.)