User Agent String.Com 

User Agent String explained :

Opera 7.23
Opera	Name : Opera
7.23	Opera version
Windows NT 6.0	Operating System: Windows Vista
U	Security values: N for no security U for strong security I for weak security
zh-cn	Language Tag, indicates the language for which the client had been localized (e.g. menus and buttons in the user interface) zh-cn = Chinese - China
First visit:	2008.10.03 05:12
Last visit:	2014.02.12 03:15
All Opera user agent strings