INTEL 512AN_HMW Wireless WIFI Link 5100 that allows a PC to connect to a radio-based computer network.

Compatible Dell laptop models:
Inspiron 1320 1427 1440 1545 1570 1470
Latitude 2100 E420a0 E4300 E5400 E5500 E6400 E6500 E6510 XT2 Z600
Precision M2400 M4400 M6400 M6500
Vostro 1320 1520 1720
Studio 1435 1450 1457 1537 1555 1737 1745
XPS 1640


Specs:
2.4GHz, 5GHz Dual Band featuring A,B,G,N Quad-Mode

It also supports:
IEEE 802.11a
IEEE 802.11b
IEEE 802.11g
802.11n with speeds up to 270mbps