Widely used for computer speaker, blue tooth audio, home audio and so on. The machining tolerance can reach +/-0.02mm. The coatings are mostly NiCuNi, which can endure at least 48h SST. Majority of them have the material grade from N grade to M grade. The field of electronic products is a traditional application field for high-performance neodymium iron boron materials. The electroacoustic components (micro microphones, micro speakers/receivers, Bluetooth earphones, high fidelity stereo earphones), vibration motors, camera focusing, and even future sensor applications, wireless charging, and other functions in smartphones all require the application of the strong magnetic properties of neodymium iron boron.