what is mean by system features in SRS

i m wrinting SRS but, i m getting problem in system features. what i hav eexactly write in system feature. means particular moduals description or anything else?

HI friend...

According to me your document should hold

1. Project functionality (What should be done and what should not)
2.Software, Hardware interfaces and user interface
3.System Correctness
4.Security
5.performance criteria
6.Implementation issues (risks)

Thanks
deepasree

here i have to write SRS alone. i almost completed it, can u explain me by some example of my question?