Bus 002 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
See the Realtek site for more info
|Realtek 8188CUS USB Wireless Centos 6|
In case you have this USB device without the drivers, I have made
Realtek RTL 8188CUS Drivers available to download and build.
I believe they will suit 32 or 64 bit systems and these are for 300Mbps devices which should be suitable for most purposes.
Once you have built the drivers for the Realtek USB device, you can proced to set up the NetworkManager and WPA2 encryption to manage it.