RASPBERRY PI RELAY BOARD 4 GPIO; Silicon Manufacturer:Broadcom; Core Architecture:ARM; Core Sub-Architecture:ARM11; Silicon Core Number:BCM2835; Silicon Family Name:BCM2xxx; For Use With:Compatible with Raspberry Pi 2 Model B Raspberry Pi Model B+/A+; Kit Contents:Relay EXTRA Board; Product Range:-; Features:4 On-board Relays 4 Indicator LEDs/GPIO Compact Size Raspberry Pi HAT Footprint