Hi Radio Power USB Adapter 3 TIMES longer distance High Radio Power: 17dBm for 802.11g, 20dBm for 802.11b 4.5dBi High Gain Antenna build-in 11b: 2 km, 11g: 1 km (Line of sight) Long USB cable 4M 10M, 15M, 20M, 25M Long USB cable is Optional Standards Compliance: 802.11b/g (Wireless) Modulation Method : IEEE 802.11b: CCK, DQPSK, DBPSK IEEE 802.11g: BPSK, QPSK, 16QAM, 64QAM RF Spreading Method: Direct Sequence Spread Spectrum (DSSS) / OFDM Frequency Band: N. America / FCC : 2.412 ~ 2.462 GHz (11 channels) Europe CE / ETSI : 2.412 ~ 2.472 GHz (13 channels) Japan : 2.412 ~ 2.484 GHz (14 channels) France : 2.457 ~ 2.472 GHz (4 channels) Spain : 2.457 ~ 2.462 GHz (2 channels) Transmission Rates: 1 ~ 54 Mbps, with auto fallback Transmitter Characteristics: RF O/T power: 11b: 17 dBm, 11g: 13dBm(Typical) Receiver Characteristics: Sensitivity: 11b: -85 dBm@11Mbps, 11g: -72 dBm@54Mbps (Typical) I/O interface : USB 2.0/1.1/1.0 LED: Power, Link Antenna: Integrated with 4.5 dBi Hi-Gain Antenna Environmental Requirements: Operating Temperature:0?to 50?C Storage Temperature: -20?to 70癈 Humidity: 5% to 90%, non-condensing Dimensions: 250 x 20 x 8 mm Regulartory Approval: FCC;CE Software Support : Windows-based Wireless Management System. Windows 98, Me, NT 4.0 (SP4 or above), 2000, XP Transmission Range: 11b: 1 km, 11g: 0.5 km (Line of sight)