Control board With the help of this expansion board for your Raspberry Pi you can control up to 3 RGB-LED-Matrix rows with the common HUB75 interface, e.g. our Joy-It RGB-LEDMatrix (LED-Matrix01). In addition, a 25x25mm fan is installed and a heatsink is enclosed to ensure sufficient cooling of the Raspberry Pi. SpecificationsFunctionLogic level converter from 3.3 V to 5V for controlling of up to 3 LED matrix rowsPassive and active coolingAluminium heatsink with a 25x25mm sized fanCompatible withRaspberry Pi 3A/B/A+/B+, 4BInput voltage5 VoltInterfaces3x HUB75 plugsData line E switchable with jumpers to Pin 4 or 8Dimensions65 x 56 x 26 mmWeight40 gItems ShippedController, heatsink, fan, 2 spacers, 6 screws and nuts, 4 flat washers , 2 jumpershttps://joy-it.net/en/products/RB-MatrixCtrl