score:6
You need to carry with you proof of your stay (and your return), and that you'll have enough funds to cover your trip; as you may get asked for it.
For example, the immigration officer might ask for:
Keep in mind that a visa is not a guarantee of entry, just permission to go knock on the door. So be prepared with documents that support your intended purpose of stay.
Upvote:3
10 years means you can use it for multiple entries during 10 years (and yes, European citizens who Need a visa normally get it for 10 years).
However, the actual time you can remain on each visit is usually 6 months