WIFI ADAPTOR - 

Official Raspberry Pi USB WiFi Dongle
RS brings you the Raspberry Pi Foundation's Official USB WiFi Dongle. This compact, white, plug and play wireless adaptor is perfect for your Pi. Features & Benefits of the Official Pi USB WiFi Dongle

Fantastic performance with a strong WiFi reception

Easy to use — plug into a USB port on your Pi and you are ready to go

Compact in size: 30 x 16 x 8 mm

NOOBS and Raspbian operating system support

802.11 b/g/n

USB 2.0

BCM43143 chip set

150 Mbps maximum throughput

Raspberry Pi logo — that's official