This is a micro:bit Power Supply Module rated at 3.3V 2A. It allows you to power your micro:bit with either a micro-USB or DC barrel jack power supply with an input range of 5V-12V. The output voltage of 3.3v can be connected directly to the battery connector of the micro:bit, providing a stable power source. https://elecena.pl/product/22719161/micro-bit-power-supply-module-3-3v-2a-discontinued 2023-03-07 https://elecena.pl/product/22719161/micro-bit-power-supply-module-3-3v-2a-discontinued 2024-09-19