Xiaomi Smart Band 9 Active, Black 1.47” TFT display for seamless interaction 1.47” large screen, easier to view information 60Hz high refresh rate, smooth use Long battery life Up to 18 days of battery life for normal daily use 50 sports modes 50 sports modes, including 10 professional training modes, suitable for sports beginners All-day health monitoring All-day heart rate monitoring All-day SpO2 monitoring Sleep monitoring Lightweight and compact 9.99mm watch Compact 9.99mm smartwatch, wear freely Colorful straps and watch faces Luminous strap to protect your night travel safety 100+ watch faces and customization options Water resistance up to 50m 5ATM waterproof standard indicating the possibility of using the watch while swimming.