Use Haylou Sound to quickly check the power level of your headset, set different sound effects for your headset, modify headset button settings, and upgrade your headset firmware version. Haylou Sound currently supports only headphone models: S35 ANC、X1 2023、W1 ANC、Purfree Lite、S30、X1 Plus、Mori Pro * Some features will not be available on all products