Xiaomi Smart Band 9 - Arctic Blue

1.62" AMOLED display for seamless interaction � Automatic screen brightness adjustment and 1200nit Max brightness � 60Hz high refresh rate, smooth usage Up to 21-day battery life � Up to 21-days battery life for normal daily use. � Fully charged within 1 hour. Upgraded all-round sleep monitoring � Sleep monitoring function professional upgrade � Record sleep data and give professional advice Improved heart rate and SpO? monitoring � Upgraded high-precision sensor to increase heart rate accuracy by 10% Watch level fine vibration � Upgraded linear motor � 20 original vibration modes Professional Workout Analysis � 150+ workout modes to record your heart rate and burned calories. � 10 on-wrist running courses, could vibrate and light the screen to remind you to meet your heart rate and pace goals.