The Raspberry Pi 2 Model B v1.2 features a BCM2837 ARMv7 Quad Core Processor on 900MHz and 1GB RAM. This makes the Raspberry Pi 2 Model B 6x faster than its predecessors and has twice as much memory. The RPi 2 model B has the same board layout as the Model B +, so all housing and addon boards designed for the Model B + are fully compatible. GPIO is 100% compatible with Model B + and Model A + boards and the first 26 pins are identical to Model B and Model A to ensure complete compatibility across all boards. The Raspberry Pi 2, unlike the Raspberry Pi 3, has no onboard WiFi and Bluetooth, leaving the UART interface available on the GPIO pins without requiring any adjustments.