Features:  802.11n/g/b 300M Wireless WiFi USB 2.0 Adapter (Realtek 8191 Chipset).  Complies with IEEE 802.11n(draft)， IEEE 802.11g， IEEE 802.11b standards.  Provides USB 2.0/1.1 hight speed interface.  Transmission rate up to 300Mbps.  Supports Ad-Hoc， infrastructure WLAN network， wireless roaming.  Supports Windows 2000， XP 32/64-bit， Vista 32/64-bit， Linux， MAC OS x.  With an external antenna.  Simple configuration and easy to use.  It can be worked with laptops， notebooks and PC desktop computer as well.  Specifications:  Wireless standards: IEEE 802.11n(draft)， IEEE 802.11g， IEEE 802.11b standards  Interface: hight speed USB 2.0/1.1  Data rate:  802.11n up to 300M (downlink) and 150M (uplink);  802.11g 54/48/36/24/18/12/9/6 Mbps auto fallback;  802.11b 11/5.5/2/1 Mbps auto fallback.  Frequency range: 2.4GHz ISM  Chipset: Realtek 8191  RF frequency: 2412-2462Mhz (North America); 2412-2472Mhz (Europe); 2412-2484Mhz (Japan)  RF output power: 13-17dBm  Radio channel: 1-14 channels  Range coverage: up to 3 times farther range than 802.11g  Roaming: full mobility and seamless roaming from cell to cell  Modulation: 11n BPSK QPSK 16QAM 64QAM OFDM; 11g BPSK QPSK 16QAM 64QAM OFDM; 11b DQPSK DBPSK DSSS CCK  Data security: 64/128-bit WEP Encryption WPA， WPA-PSK， WPA2-PSK， TKIP/AES  Media access control: CSMA/CA with ACK  LED indicator: link/active (green)  Operating system: Windows 2000， XP 32/64-bit， Vista 32/64-bit， Linux， MAC OS x  Color: black  Antenna length: 11cm  Item size: 7*2.5*1.2cm  Item weight: 22g  Package size: 17.5*11*1.5cm  Package weight: 50g  Package including:  1 * Wireless USB Adapter  1 * Software CD