The options being inside the FAST Survey software, the user should first order a FAST Survey license for ProMark3 RTK and activate FAST Survey on his unit. After launching FAST Survey, the user should read the registration code (Equip/About FAST Survey/Change Registration) in order to send it to your Magellan Dealer. Then Magellan will deliver a Serial Number and a Change Key for the desired option that are only valid for this specific FAST Survey license (they will fail in any other unit). The serial number and change key have to be entered in the same FAST Survey menu. Contact your local dealer for more info.