Hi Sohitahuja,
Insiron N4050 is shipped with the following types of wireless card:
Wireless WLAN 1701 Half Mini-Card, 802.11 b/g/n + BlueTooth 3.0
Wireless WLAN 1502 Half Mini-Card, 802.11 b/g/n
Wireless WLAN 1702 Half Mini-Card, 802.11 b/g/n + BlueTooth 3.0
Wireless WLAN 1503 Half Mini-Card, 802.11 b/g/n
Please reply with the name of the wireless card installed on your computer so that I can assist you further.