Complying with IEEE 802.11g, the TL-WN620G adopts TP-LINK Super G and Extended Range WLAN transmission technologies, resulting in transmission speeds of up to 108M. The TL-WN620G provides multi security protection. Complying with 64/128/152-bit WEP Encryption, WPA/WPA2, IEEE 802.1X, TKIP and AES, the TL-WN620G has super-safety data communication abilities and features effective security to protect the wireless network from intruders. With the internal antenna, the TL-WN620G can fit different operational environments and let the user connect to the Wireless network easily. The TL-WN620G also supports Seamless Roaming and is compatible with other 11b, 11g WLAN equipments.Protocols and Standards: IEEE 802.11g; IEEE 802.11b; USB2.0; CSMA/CA with ACK;Interface: A-type USB 2.0 Connector; Frequency: 2.4~2.4835GHz; Radio Data Rate:108/54/48/36/24/12/9/6/11/5.5/2/1 Mbps (Auto Rate Sensing); Spread Spectrum: DSSS; Modulation: 1M DBPSK; 2M DQPSK; 5.5M, 11M CCK; 6M, 9M, 12M, 18M, 24M, 36M, 48M, 54M, 108M OFDM; Transmission Distance: Indoor up to 100m, outdoor up to 300m (It is limited in an environment); Transmit Power: 17dBm(Typical); Data Security: WPA/WPA2; 64/128/152 BIT WEP; TKIP/AES; LED Indicator: Status; Power Consumption: Typically 480mA in full Transmit (TX), 420mA in full Receive (RX); Safety & Emission: FCC, CE; Dimensions: 3.9 Ã? 1.2 Ã?0.4 in.(100 Ã? 30 Ã? 11 mm)

REVIEWS:
1) Works Wonderful: TP-Link 108Mbps 802.11b/g/g+ WiFi Wireless USB 2.0 Adapter Dongle (w/ extension cord) - Atheros Chipset, supports WPA2/152Bit WEP, Wireless Roaming

If you follow the instructions that come with the device and continue without microsoft certification, it will install very sucessfully. Works great, no signal breaks, works from a block and a half away.
2) TP-Link 108Mbps 802.11b/g/g+ WiFi Wireless USB 2.0 Adapter: TP-Link 108Mbps 802.11b/g/g+ WiFi Wireless USB 2.0 Adapter Dongle (w/ extension cord) - Atheros Chipset, supports WPA2/152Bit WEP, Wireless Roaming.

Would not install because it does not have the Microsoft certification.
Had to revert back to slower/older wireless adapter that will work with my computer.

Gave up and put the unit back in original box. Will try to return for refund.

Have used other wireless USB devices successfully.

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