Raspberry Pi 3 Model B Mother Board 1.2GHz Quad Core Cortex-A53 64-Bit CPU 1GB RAM WiFi Bluetooth
The Raspberry Pi 3 has included integrated 802.11 b/g/n wireless LAN, Bluetooth Classical and LE.
You didn't need additional peripherals to make it wireless. It is 10x the performance of Raspberry Pi 1.
What's more, it has complete compatibility with Raspberry Pi 2, which means almost all the previous Raspberry Pi 2 accessories are compatible with Raspberry Pi 3.
The Raspberry Pi 3 is the third generation Raspberry Pi. It replaced the Raspberry Pi 2 Model B in February 2016.
Compared to the Raspberry Pi 2 it has:
A 1.2GHz 64-bit quad-core ARMv8 CPU
802.11n Wireless LAN
Bluetooth Low Energy (BLE)
Like the Pi 2, it also has:
4 USB ports
40 GPIO pins
Full HDMI port
Combined 3.5mm audio jack and composite video
Camera interface (CSI)
Display interface (DSI)
Micro SD card slot (now push-pull rather than push-push)
VideoCore IV 3D graphics core
1 X Rasberry Pi 3 Model B