The Product Key is a 16-character alphanumeric code and is unique to each order. Since 12/01/2017, Product Keys are printed on a tag and are physically tied to our Plugable Transfer Cables like this:

Our Product Keys:

• Use letters A-F only
• Use the number zero 0, and not the letter O.
• Do not expire
• Can be used to register as many computers as you need

If you purchased your Transfer Cable before 12/01/2017, you should have received an email containing the Product Key. Please reach out to us directly at: support@plugable.com with your Amazon order number for help with your Product Key, or if you have any questions.