– Color: Blue – 14 Digital input / output RX, TX, D2~D13 – 8 analog inputs AO~A7, 2 x TTL level serial port RX/TX – 6 PWM ports: D3, D5, D6, D9, D10, D11; Adopt Atmel Atmega328P-AU singlechip – Supports serial download – Supports external 3.3V~12V DC power supply – Supports 9V battery supply – Clock frequency: 16MHz – Comes with 2 x Pins