User Agent String.Com 

User Agent String explained :

Opera 9.64
Opera	Name : Opera
9.64	Opera version
Windows 98	Operating System: Windows 98
U	Security values: N for no security U for strong security I for weak security
ru	Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) ru = Russian
Presto	Layout engine for Opera
2.1.1	Presto version
First visit:	2009.04.21 05:42
Last visit:	2018.07.29 10:46
All Opera user agent strings