I/O EXPANSION BOARD FOR RASPBERRY PI B+; Silicon Manufacturer:Microchip; Core Architecture:-; Core Sub-Architecture:-; Silicon Core Number:MCP23S17; Silicon Family Name:BCM2xxx; For Use With:Compatible with Raspberry Pi 2 Model B Raspberry Pi Model B+/A+; Kit Contents:GPIO Expansion Board; Product Range:-; Features:2 Changeover Relays 8 Digital I/Ps Graphical Emulator & Simulator Used with Python Scratch & C