The integration of micro neodymium-iron-boron (NdFeB) magnets into wireless headphones and smartphones represents a triumph of materials science and engineering, enabling devices to achieve unprecedented levels of miniaturization without sacrificing magnetic performance. This balance is critical for core functionalities such as sound quality, wireless charging, and device stability, all of which rely on the unique properties of NdFeB magnets. Below, we explore how these magnets achieve this equilibrium through advanced material design, precision manufacturing, and innovative application strategies.