300Mbps Wireless USB WiFi Adapter With External AntennaFeatures: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 standardsInterface: hight speed USB 2.0/1.1Data 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 ISMChipset: Realtek 8192RF frequency: 2412-2462Mhz (North America); 2412-2472Mhz (Europe); 2412-2484Mhz (Japan)RF output power: 13-17dBmRadio channel: 1-14 channelsRange coverage: up to 3 times farther range than 802.11gRoaming: full mobility and seamless roaming from cell to cellModulation: 11n BPSK QPSK 16QAM 64QAM OFDM; 11g BPSK QPSK 16QAM 64QAM OFDM; 11b DQPSK DBPSK DSSS CCKData security: 64/128-bit WEP Encryption WPA， WPA-PSK， WPA2-PSK， TKIP/AESMedia access control: CSMA/CA with ACKLED indicator: link/active (green)Operating system: Windows 2000， XP 32/64-bit， Vista 32/64-bit， Linux， MAC OS xColor: blackAntanna length: 11cmItem size: 7*2.5*1.2cmItem weight: 22gPackage size: 17.5*11*1.5cmPackage weight: 50gPackage including:1 * Wireless USB Adapter1 * Software CD