For the right use of the product please read and use this information:
1) Please connect the cable as shown in the OBD Wiki.
2) Connect the bootpin to the ECU as on the picture in the Wiki and connect the bootpin to ground.
3) Turn on the power supply preferably a laboratory power pack. It should be 12V and 3A.
4) Carry on with the action you wanted to do (read or write)