Nintendo Product description :

It’s designed for your Nintendo eShop purchases—no credit card required. The perfect gift for anyone who loves to play—including you. Choose from over 1,000 new, classic and indie games – delivered directly to your Nintendo Switch™ system. Digital Card balances may only be used on a single Nintendo eShop account.

How to redeem:

1. Using a browser, visit nintendo.com/redeem/#/
2. Select Sign inand enter your Nintendo Account e-mail address and password, and then select Sign inIf you are already signed in, review the user name in the top-right corner to confirm you are signed in with the correct Nintendo Account
3. Enter your 16-digit download code and then select, Next
4. Re-enter your Nintendo Account password when prompted, then select Redeemto complete the process.
   • A confirmation e-mail will also be sent to the e-mail address registered to your Nintendo Account once this process is completed.