Edimax 300 Mbps 802.11a/b/g/n Dual-Band PCI Express Adapter (EW-7722PnD) Dual-Band allows you to use this adapter normally in 2.4 GHz band w/ the majority of the existing wireless networks. But, when you use it w/ a Dual-Band Router, you can utilize the 5 GHz band for non-congested & ultra high-speed transfers. With 2T2R MIMO technology, it allows for maximum 300 Mbps 802.11n Wireless data rate on 2.4GHz or 5GHz band to have the farthest range with the widest coverage and it is backward compatible with 802.11b/g. The EW7722PnD comes with two detachable 3dBi dual-band antennas and also a low profile bracket, which enable it to achieve better signal quality compared to common wireless adapters. It would allows better streaming of real-time data such as Video, Music, Skype.etc Standards: IEEE 802.11a/b/g/n. Security: 64/128 bit WEP, WPA, and WPA2 Encryption, Hardware WPS. Interface: 1 x PCI Express Interface, 1 x Link LED, 1 x Tx/Rx LED, 1 x WPS Button, 2 x RP-SMA connector, 1 x Low Profile Bracket (Additional) Wireless Data Rates- 11a : 6/9/12/24/36/48/54Mbps, 11b : 1/2/5.5/11Mbps, 11g : 6/9/12/24/36/48/54Mbps, 11n : (20MHz): MCS015 (up to 144Mbps), 11n : (40MHz): MCS015 (up to 300Mbps). Modulation - OFDM: BPSK, QPSK, 16-QAM, 64-QAM, DSSS Frequency Band: 2.4 ~ 2.4835 GHz ( Industrial Scientific Medical Band ), 5.150 ~ 5.825 GHz. Antenna: 2 x Detachable 3 dBi Dual-Band Antenna. Dimensions: 0.9 x 4.7 x 3.5 inch (Without Antenna) Operating Temperature: 0-40C (32-104F). Operating Humidity: 10% ~ 90% ( Non-Condensing ). Operating System: Windows XP/Vista/Win7