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Raspberry Pi 2 model B - The Raspberry Pi 2 Model B is the second generation Raspberry Pi. It replaced the original Raspberry Pi 1 Model B+. Compared to the Raspberry Pi 1 it has:
A 900MHz quad-core ARM Cortex-A7 CPU
1GB RAM.
it also has:
4 USB ports / 40 GPIO pins / Full HDMI port
/ Ethernet port / Combined 3.5mm audio jack and composite video / Camera interface (CSI) / Display interface (DSI)
/ Micro SD card slot /VideoCore IV 3D graphics core.
Category: Development hard- software
Subcategory: Raspberry PI