Intel PRO/Wireless 2011B LAN Product Reference Manual page 9

IEEE 802.11 devices use frequency modulation (FM) to transmit digital data from one device to
another. The radio signal propagates into the air as electromagnetic waves. The receiving device
demodulates the signal, which results in the original digital data. The radio devices transmit in the
2.4 to 2.5 gigahertz frequency range, a license-free range throughout most of the world. The actual
range is country-dependent.
Intel® PRO/Wireless 2011B LAN Adapter Product Reference Guide 3