1. Operating Voltage (logic level): 5V
2. 8 analog inputs ports: A0 ~ A7
3. 14 Digital input / output ports: TX, RX, D2 ~ D13
4. 1 pair of TTL level serial transceiver ports RX / TX
5. Using Atmel Atmega328P-AU MCU
6. Standard 0.1” spacing DIP (breadboard friendly).
