App Store iTUNES gift card up500 RUR for RUS iTune ₽

1. The cardholder needs to go to the iTunes Store, iBooks Store or App Store on his device, and at the end of the "Selection" section, click "Enter code".
In the App Store on the phone "Redeem gift card or code"

2. Next, you need to log in by specifying the Apple ID and then enter the character code indicated on the card in a special field.

3. With the funds available in the gift card account, you can buy music, movies, TV shows, programs, books, audiobooks, Apple Music subscriptions, iCloud storage space and much more.

The card is valid only in the Russian Federation for purchases in Apple multimedia services. Activation is possible only if you have an Apple ID after accepting the terms of use and license agreement. The card is not subject to exchange for monetary equivalent, resale and shipment outside the Russian Federation

Do not try to buy for accounts of other countries. The AppStore will definitely not accept a card from another region, only to a Russian account in rubles.
And there will be no return/exchange, you can only create a Russian account and credit it to it or donate/sell