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Fits onto any Raspberry Pi computer with a 40-pin GPIO header Onboard Raspberry Pi RP2040 microcontroller manages low-level control of LEGO Technic devices Controls up to four LEGO Technic motors and sensors DC power connector: 2.1mm barrel jack, centre positive Requires an external 8V ±10% DC power source – like the Raspberry Pi Build HAT Power Supply, or a 7.5V battery pack