ATMEGA328P Pro Mini 5V/16MHz

1. 20 digital input/output port RX and TX, D2 ~ D13, A0 ~ A5
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 3.8 V ~ 12 V dc power supply
8. Support the 12 v 
9. 16 MHZ clock frequency
10. Size: 33.3 * 18 (mm)