1. The nature is different: the earphone usb is powered by the USB port or transmits data and music through the USB. Adopt square USB interface, 5V current, digital audio transmission. wired usb headset ，The normal jack is a 3.5 audio interface, which is circular and only has analog audio signals.
2. Different sockets: ordinary sockets are USB sockets, and the earphone usb obtains power through the USB port or transmits data and music through the USB port. Only the audio interface with analog audio signal 0.5 is round, use square. USB interface, is 5V current and digital audio transmission,
3. Different features: the audio chip of the USB interface is external, and the chip on the ordinary earphone is generally on the motherboard.