Rosewill RNX-G1 802.11b/g Wireless USB Adapter for $11.99 Shipped

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Rosewill RNX-G1 802.11b/g Wireless USB Adapter for $11.99 Shipped

Newegg.com has the Rosewill RNX-G1 IEEE 802.11b/g USB 2.0 Wireless Black Dongle with External 2dBi SMA Antenna Up to 54Mbps Wireless Data Rates 64/128-Bit WEP, WPA, WPA2 for a good price.

Item has a rating of 4/5 from 374 reviews

1. Newegg Price : $11.99 Shipped

 

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I use one similar to this with my netbook. Even though the computer has internal WiFi, the USB adapter can connect much farther, and keep a fast connection at greater distances. YMMV, but for this price it's well worth a try if you use WiFi at locations where the signal is a bit sketchy.

 

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Information for Linux / Wifi testing Geeks

Works in Linux, supports monitor mode, but no injection.