Ecu code reader? ok

okay im new to this ECU trouble code reading shit, and im getting confused,,, i walked into sears the other day and starting looking for one so i found 2 (( obd-II ?? )) ecu trouble code readers,,, well the guy at sears said that it wont work on my car becuase there for 96 and newer cars....


what kinda ecu trouble code reader will work for my 92 eclipse gs 2.0 non-turbo....


please explain to this to me