Most flexible with detachable antenna

Wireless 300N USB antenna adapter

My System

High-speed data rate with up to 300Mbps
Complies with 2.4GHz 802.11n and downwards compatible with IEEE 802.11g/b standards
Detachable 3dBi antenna with RP-SMA connector
Advanced Security Features with WPA2/WPA/WEP Encryption
Suitable for all common network environments
Supports WPS (WiFi Protected Setup)
Compatible to USB 1.1 and USB 2.0 interface
Status LEDs for Link and data transfer
1 Transmission Channel / 2 Receiver Channel
Supports Windows 7, Vista, XP, Mac OS X and Linux