ITEM NAME:1PCS Arduno Pro Mini Boards Free With Header ATMEGA328P 16MHz 5V Descriptio n Description: - 14 Digital input and output ports (TX, RS ....) - TTL level serial tranceiver port RX/TX - 6 PWM ports, D3, D5, D6, D9, D10, D11 - Uses Atmel Atmega 168p microcontroller - Supports serial download - Support for external 5v-12v DC power supply - Support 9V Battery.We'd like to settle any problem in a friendly manner. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. Specifications:Material: electronic components, etc.