Mi Smart Band 6 is getting an update that brings a sleep breathing quality monitoring feature, which is rolling out to the Mi Fit app. The feature will monitor and rate the quality of your breathing at night while you sleep. The Mi Smart Band 6 was launched alongside the Mi 11 series in China on March 29, and went on sale in the country this week. It comes with features like SpO2 monitoring, heart-rate monitoring, and sleep tracking. The new fitness wearable is yet to be launched in India.