What do the buttons on my OPTAC tool mean?

full-downloadThis button enables you to download all the information on a particular vehicle (choose this option if it’s the first download you are doing for this vehicle.)

half-downloadThis button enables you to do a partial download. It will collect the information recorded since the last download  

download-buttonThis button enables you to download drivers’ cards.  

switch-onThis button switches the tool on/off.