Dell 3521 is a very well performed laptops.I am using this PC for many years .
The specification of these laptops are
it have 4gb ram, 500gb internal hard disk, 1gb graphics, 15.6 inch touch HD display, 6 lithium batteries, 4 USB ports, hdmi slot, 4 indicators, 1.3 MP web Cam, wireless, Bluetooth and etc.
Must tell you guys it’s touch display is very smooth. Though it’s display is not full HD and it’s really heavy to carry, And this laptop is poor for gaming, you may not install new big games, grapichs for gaming is also not sufficient. Apart from gaming it’s quite a good source for entertainment .