DYS USB Linker Programming Tool for Atmel Based ESCs (BL/SN Series)

ESC firmware can make the difference between super stable flight and erratic flight. This handy USB programming tool allows you to quickly and easily update the firmware of your ESC by connecting directly to the ESC's signal wire and then to the USB port of your PC. With it, there is no need to cut open the heat shrink or use any additional interface components. Simply plug it in and flash! It's designed to work with Atmel based ESCs, such as the DYS SimonK (SN) and BLHeli (BL) series ESCs

USB Driver Download: USB to UART Bridge VCP Drivers

BLHeli Flashing Software Download: BLHeliSuite 

SimonK Flashing Software Download: kkmulticopterflash

Useful instructional video.

DYS ESC USB Linker Programmer for SN16A SN20A SN30A SN40A BL16A BL20A BL30A BL40A (if you are using the new DYS XM series ESCs, you need the V2 linker).