- 14 digital input / output ports: TX, RX, D2~D13
- 8 analog input ports: A0~A7
- 1 pair of TTL level serial transceiver port: RX / TX
- 6 PWM ports: D3, D5, D6, D9, D10, D11
- Adopts Atmel Atmega328P-AU MCU, FT232 original chip
- Support USB directly download and power supply
- Support external DC 5V~12V power supply
- Support 9V battery power supply
- Support ISP download
- Three kinds of power supply methods: USB, VIN, external 5V input