Linksys Wireless G PCI Adapter with SRX400 Data Rates - Up to 54Mbps Frequency Band - 2.4GHz Channels - 11 CH (US, Canada), 13 CH (ETSI), 14 CH (Japan) Modulation - CCK, DBPSK, DQPSK, OFDM Security - 64/128-Bit WEP