13.3inch laptop computer 2GB memory 320GB HDD with DVD R\W

Z Series N270\280
CPU Intel? N270\N280 Duo 1.6GHz\Duo 1.66GHz
Display 13.3" LED panel 1366*768 (16:9)
System Memory 1G\2G DDR II
HDD 160G\250G\320G\500G SATA
DVD R\W  9.5"DVD R\W(Option) 
3G (Option)
Bluetooth (Option)
Sound System High definition Audio support 2.0 channel output2 Audio jacks
Card Reader&slot 4-in-1 Card Reader support (MMC/SD/MS/MS Pro)
LAN & WIFI 10/100MB LAN \ WIFI 802.11G\B
PC camera 1.3 Mega Pixels
Power & Battery 6cell  battery
O.S. Windows? XP \ Windows? VISTA? \Windows? 7
Dimension 325 x 225x 26 mm,1.75kg weight