How to use F12 "M" button to set the speed

How to use F12 "M" button to set the speed

[@tdurden8747]

Can you please explain what are you are doing? (if possible, english please sir) . Thanks!

[@XiaoZe2012]

Does it make speed go faster-?

[@P.E.K.K.A_14]

Hey i recently bought one of those and when i got it it was broken 😞