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: HATs - Automation and Motor Contol; Features: 2 Changeover Relays, 8 Digital I/Ps, Graphical Emulator & Simulator, Used with Python, Scratch & C