SunFounder Mars Board - Compatible with Arduino UNO R3 ATmega328P Type C 2017 Latest Version SunFounder MARS is totally compatible with the official Arduino Uno, with also ATmega328P as processor, the same Optiboot bootloader as Uno, thus programmed with Arduino IDE Uses FTDI232R for USB-to-serial and Type-C USB Port, more stable and reliable All I/O ports with two pins (male and female), free to use - just plug Dupont wires regardless of M or F Operating Voltage: 5V, Input Voltage: 7-12V (preferred 9V) Adds a 5V power switch for convenience