Picoino 3-Pack Bootloader Kit for Arduino Uno R3 boards: 3x Atmel ATmega328P-PU, 3 items with Arduino Uno Bootloader, genuine Instructions 3x Atmel ATmega328P-PU MCU for Arduino Uno R3 with DIP IC, bootloader and UNO board test sketch! Each chip is tested after flashing the bootloader and test app! NO bugs - Chips! Arduino Bootloader flashed into it. Works in every Arduino UNO board with DIP socket! All chips are flashed by our own professional equipment and every single chip is checked after flashing and checking the bootloader. We use professional sockets to leave the pins untouched. You get: 3 x MCU ATmega328P-PU with Arduino Bootloader. Comes with our original Picoino by TRONICS4PEOPLE Instructions. Comes with our preloaded check application to check all of your Uno board I/O Pins! The application will automatically be deleted when you are finished and flash your own sketch. You will get a package of 3 pieces new MCUs with bootloader. You don't have to worry anymore that you are without a working MCU if you burn another one. You can also use the chips with external components on a breadboard. You get 3 MCU units which you can use immediately, because we flashed already the Arduino bootloader on it. We flash "ready, set, go!" for 16 Mhz external oscillator. The picture is a symbol picture and not the actual piece you get, but your piece will be similar. Comes in anti-static rails or on ESD foam wrapped in anti-static bags.