Choosing an external usb CD/DVD R/W drive.

Hi
I am looking for an external USB CD/DVD R/W drive for my laptop as it does not come with one. I look on Amazon and they only say DVD drive. How do I know whether it can R/W both DVD and CD? Here is the link for Amazon:http://www.amazon.com/s/ref=nb_sb_ss_c_0_7?url=search-alias%3Dcomputers&field-keywords=usb%20dvd%20drive&sprefix=usb+dvd%2Caps%2C401.

Please give me a suggestion which one to buy from the list. I don't need the best or what, I just need one that work with Windows XP, 7 and 8.

Thanks

 

Thanks for the reply, I wait for a day with no reply, so I ordered this one:
http://www.amazon.com/gp/product/B003M0NT1M/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1

Hope this will work.