For your reference, here is more information about the Xiaomi Smart Band 9:
1. The 1.62-inch AMOLED retina-grade full-color display features a track-shaped full screen, allowing for more information to be visible at a glance;
2. The high-performance PPG(Photoplethysmography) bio-sensor supports blood oxygen detection, providing a deeper understanding of your physical condition;
3. The intelligent light-sensing feature automatically adjusts the screen brightness. With an ambient light sensor, the screen brightness adjusts according to the surrounding light, enhancing the viewing experience;
4. Pre-set styles on the band displays are customizable, allowing people to mix and match with a variety of colorful bands made from different materials to express their personality;
5. The metallic-textured middle frame features a high-gloss NCVM(Non-Conductive Vacuum Metallization). It is available in five colors: Midnight Black, Glacier Silver, Mystic Rose, Arctic Blue, Titan Gray;
6. Comprehensive health protection is provided, supporting all-day heart rate monitoring, sleep tracking, sleep apnea detection, sleep respiratory rate monitoring, all-day blood oxygen saturation monitoring, all-day stress monitoring, breathing exercises, vitality scores, and women's health management;
7. It supports 159 different sports modes, utilizing advanced sports algorithms to measure key metrics such as VO2 max, training load, recovery time, and aerobic/anaerobic training effects, comprehensively assessing sports performance;
8. It features vitality score display: showcasing calories burned, step count, standing time, and duration of moderate to high-intensity activities (choose three out of four). Scientifically recording daily activities, provides clear insights into achieving fitness goals, promoting a vibrant and healthy lifestyle;
9. People can engage in a weekly vitality competition with friends via the Mi Fitness APP, using an H5 link to invite friends to a 7-day challenge. Participants compete for health rainbow scores and supervise each other's fitness achievements. The person with the highest total score at the end of the week earns an exclusive challenge medal;
10. It offers a variety of thoughtful features to enhance daily life experiences, supporting Always-On Display and Pomodoro timer. It enables various health monitoring functions directly on the band (such as all-day heart rate monitoring, blood oxygen detection, and stress monitoring);
11. When connected to the Mi Fitness APP, the Xiaomi Smart Band 9 defaults to a typical mode with a battery life of up to 18 days. Enabling AOD (Always-On Display) reduces the battery life to 8 days;
12. It can be used with accessories such as the pebble mode and pendants;
13. It can be paired with seven different retail bands.