brand new and high quality Material: Electronic Component Color: See pictures Leads to all the digital IO port and analog IO port, each IO port has a standard positive and negative power connector Leads to the I2C interface on the motherboard to facilitate the connection and I2C devices Increase the for DC power supply interface.for NANO board USB interface, the actual supply current is only 50MA, to bring high-current equipment such as steering gear when obviously inadequate, this for time in the for DC power supply interface to provide an external power supply to ensure the stability of equipment operation. No Retail Packages Quantity: 1Pc Note: Due to the difference between different monitors, the picture may not reflect the actual colorof the item. Thank you!