In Reason 7 and later, and Reason Essentials 2 and later, we’ve added a new way of authorizing the software. You can authorize your licenses to one single computer, for offline use. This way you can use Reason without being connected to the internet, or without a USB port taken up by the key.
If you use Reason on several computers, you will still be able to use Internet Verification.
Read more about computer authorization here.