The Atmel AVRISP mkII (AVR ISP mk2 / XPII) is a high-quality USB In-System Programmer (ISP) designed for programming and debugging Atmel AVR microcontrollers directly on the target circuit.
Developed by Atmel (now Microchip), this original programmer provides fast, reliable, and accurate programming via the ISP (In-System Programming) interface. It supports a wide range of AVR devices and works seamlessly with Atmel Studio 4, 5, 6, and 7, as well as with AVRDUDE for command-line and Arduino use.