Click on link below to go to Unagi's referral page. Input your email address in the space provided. Check email for your personal code for your free first month of subscription and copy it. Go back to Unagi's website and customize your subscription scooter and when you get to the credit card information screen click on link in upper right corner: "Apply Promo" . This brings up a small window with the breakdown of charges and a highlighted area for you to input your code from the email. Click on apply and price will adjust accordingly!! *Note: Must be a new customer and you must sign up for subscription service with the same email you received the code with. ENJOY