•USB Type: Micro USB/Type-C USB
•CH340G Replace FT232RL
•8 analog inputs ports:A0 ~ A7
•14 Digital input / output ports:TX,RX,D2 ~ D13
•6 PWM ports:D3, D5, D6, D9, D10, D11
•1 pairs of TTL level serial transceiver ports RX / TX
•Using Atmel Atmega328P-AU MCU
•There is bootloader installed in it
•Support USB download and Power
•Support for external 5V ~ 12V DC power supply
•Support power supply by 9V battery
•Support ISP download