Translations:KAVAN Pro programming card - Instruction manual/12/en

From KAVAN RC Wiki

OK Button: press the OK button after you adjust all the parameters (you want to adjust). A Red "——" will show up on the right LED display for about 1 or 2 seconds to indicate it’s transferring the new parameter values to your ESC. The red "——" will disappear when the ESC saves all the parameter values.