The Sony WH-1000XM2 is the second generation of the MDR-1000X headphone, with slightly different model naming rules. Since Sony's active noise reduction on the MDR1000X headphones has received unprecedented recognition, Sony has changed the prefixes of earphone, MDR, a naming rule for the last decades, then the 1000 number as a series logo. The WH-1000XM2 is consistent with the MDR-1000X in terms of its appearance and main functions. It is optimized on the buttons, and the internal main control and noise reduction functions should also be adjusted to support mobile app control, and supporting for noise reduction environment adaptation and app control recognition. New features, such as ambient noise environmental testing and others are added.