The Scorpion V Link II cable allows your Tribunus ESC to interface with the SPROTO software for quick programming and firmware updates.Please note: V Link II driver download and install required. https://www.scorpionsystem.com/files/download/CH341SER.zipSPROTO for Tribunus programming software link: https://www.scorpionsystem.com/files/download/SprotoPlatform.install.zipScorpion V Link II Cable