1、[Dynamic Audio Experience] This speaker extension board enhances your Micro:bit using experience, no longer just a static data display, but a dynamic audio presentation. 2、[Efficient Power Amplification] This board uses NS8002 bridge audio power amplifier, providing stable and efficient power output, ensuring optimal speaker performance. 3、[Practical Features] Equipped with a headphone jack for private audio listening, volume knob for precise volume control, and source selection switch for easy sound selection. 4、[Reliable Power Supply] Operating at DC2‑5.5V, the speaker extension module adapts to various work environments such as STEM education, scientific displays, providing stable power. 5、[Simple Interface] The Micro:bit audio amplifier module features clear pin descriptions, making installation and wiring easy to understand. Item Type: Micro:bit Speaker Extension Board Material: PCB Operating Voltage: DC 2.0-5.5V Function: Expand a speaker for micro:bit, with on board NS8002 bridge audio power amplifier, equipped with a headphone jack, a volume knob, and a source selection switch Pin Description: 3V3: Power positive (3.3V power input) GND: Power ground Signal: Audio output pin 1 x Micro:bit Speaker Extension Board 1 x Volume Knob 1 x User Manual