A Set AVR ISP USBtinyISP Programmer For Arduino Bootloader USB Download Interface ISP connector: 6-pin and 10-pin size: 28.8mm  61.6mm power supply options: external power supply and USB power supply (if using an external power supply chip set ISP10 near yellow jumper cap removed) USB power supply, can provide direct power to the Arduino, open the Arduino IDE, after choosing the Bord need to download the hardware name, in the Burn Bootloader choose USBtinyISP, start downloading bootlaoder, then download is completed within 1-2 minutes. The download cable to connect the supplied 6 pin connector, can be used as an addition to the Arduino download cable, but also suitable for downloading most of the AVR program.