A Wi-Fi 802.11n + Bluetooth 4.1 (Dual Mode) add-on board for any Pi model with the 40 pins GPIO connector including Pi 2, A+ and B+
It is an add-on board that provides Wi-Fi and Bluetooth connectivity for the Raspberry Pi.
You can use Wi-Fi and Bluetooth USB dongles, however …….
IoT HAT is more affordable
IoT HAT for Raspberry Pi: A must-have for Pi Zero – [Link]