The CodeMeter is a USB stick which will verify that you are running a legitimate copy of our software. In fact, the stick contains a cryptographic device which will decrypt the executable of our software. The benefit of this method is that we can allow you to make backup copies of the installation CD, and to install it on more than one computer. You just need to take the USB stick with you and plug it into the one computer that you are currently using. The downside is, if the USB stick gets stolen, gone is your software license with it until the stick can be detected somewhere. We recommend registering your stick at the CodeMeter.com website so that you can have it remotely disabled if the stick disappears. This will make it easier for eSim Games to provide you with a new stick and license for a mere token fee (plus shipping & handling), and not charge you for a full new license. In addition, you can buy additional LAN licenses at a much reduced price (80% discount on the normal price).