ITEM NAME:16MHz 5V MiniTmega32U4 ReplaceTmega328rduino Mini Module New Description&Preview.1 to the TTL level a serial port to send and receive port RX/TX. 8 analog input port A0 ~ A7. 14 digital input/output port RX and TX, D2 ~ D13. 4.6 a PWM port, D3, D5, D6, D9, D10, D11. You can follow below process to chontact us.