The application scenario varies according to the interface. Because the USB interface is a digital signal transmission, it can ensure the stability and clarity of the sound quality, which is more common when using digital devices such as computers and mobile phones.
The 3.5mm interface is analog signal transmission, and the sound quality is better for low-impedance earplugs and headphones, which is suitable for use in analog devices such as music players, CD players, and radios.
Therefore, the appropriate interface should be selected based on factors such as device type, usage scenario, and personal preference.