Arduino Compatible UNO R3 PLUS Sensor I/O Shield Atmega328P 16U2 Expansion Board

2 x Atmega328P-PU Arduino Bootloader installed (for UNO R3)

Arduino MEGA 2560 R3 (compatible) with ATmega16u2 USB UART

Arduino UNO R3 (compatible) Atmega328P with CH340 USB

UNO R3 PLUS Sensor I/O Shield Atmega328P 16U2 Expansion Board for Arduino

For Arduino UNO R3 Shield Board Prototype PCB Atmega328P 2.54mm Pitch Breadboard