No expiration date. The product works ONLY in BRAZILIAN ACCOUNTS. https://www.xbox.com/en-US/live/countries . Make sure that your account and IP is LOCATED in BRAZIL or a VPN connection will be required.
You will receive instantly after the payment.
Instructions for creating a new account on Xbox Live Gold:
1) On the Xbox Live Welcome page, click Continue.
2) Enter a NEW gamertag (nickname) that you have not used before.
3) The next step is to enter Windows Live ID. Click "NO" to create a new account.
4) Choose a country.
5) Select your language and enter your date of birth.
6) Enter a new email address that you have not used before to create a Windows Live ID.
7) Enter your password and security question.
8) Then enter your first name, last name, phone number and contact email.
10) Click "Redeem code" and enter the purchased 25-digit code.
11) Done! You now have an Xbox Live Gold Premium Account for 12 months.
Method of activating the card through the website:
1) Go to the site http://www.xbox.com
2) Click Sign In in the upper right corner.
3) Enter your data and go.
4) Go to Manage Profile.
5) Go to Redeem Prepaid Card
6) Enter the Prepaid Code