How can I find the specs on this laptop

[piperpilot12w]

I'm going to sell a laptop computer for my friend on Ebay.
I'm trying to find the specs for it.
It's an HP N5310
I have right clicked properties on my computer, but that only answered some things. I did find the modem, ram memory, hard drive size.
Where can I find out things such as the CPU, CD Rom/DVD speed. It only lists the manufacturer and part #.
I asked HP support and they sent me a link to look at , but that didn't help.

[query]

HP is usually pretty good about listing the data on its website.

If you don't have the manual, there should be an online version at www.hp.com.

The BIOS will tell you the processor speed and RAM size.  Windows Explorer or the BIOS will tell you the hard drive size as well.

From the specs, the n5310 appears to be a Celeron 750, 10 GByte drive, 8XDVD-ROM, 128 MBytes RAM standard.