WiFi USB Adapter for Raspberry Pi

802.11b/g/n 150Mbps Wireless USB Adapter (Plug and Play - No driver installation required)  
RALink RT5370 Wireless-N USB 2.0 Adapter allows you to connect Raspberry Pi (A+, B, B+, 2) to any Wireless-N networks in your home or office. 

Specifications: 

• 150Mbps 802.11n Wireless LAN USB 2.0 Mini Adapter
  
• External Antenna for better signal receiption 
  
• General Features: 
  
• Compact, mini design 
  
• Complies with IEEE 802.11n (Draft 2.0), IEEE 802.11g, IEEE 802.11b standards 
  
• USB 2.0 interface 
  
• Data Rate: Transmitting: up to 150 Mbps, Receiving: 150 Mbps 
  
• Supports 20 MHz/40 MHz frequency width 
  
• Auto-detects and changes network transmission rate 
  
• Provides two work modes: Infrastructure and Ad-Hoc 
  
• Supports Soft AP 
  
• Supports PSP, WII, and NDS 
  
• Security: 64/128-bit WEP, WPA/WPA2 encryption methods, 802.1x authentication standards