Arducam UCTRONICS Nano V3.0 ATmega328P Ft232rl Micro Controller Module Development Board Main Chip: Atmega328P-AU, FTDI Chip (FT232RL) is on the backside of the module 12 Digital input / output ports:D2 ~ D13, 8 analog input ports: A0 ~ A7, 1 pair TTL level serial transceiver port: RX / TX, 6 PWM ports: D3, D5, D6, D9, D10, D11 16MHz clock frequency The bootloader is already installe in the board Support for external 5V ~ 12V DC power supply, USB download and Power, 9V battery