Xiaomi is One Step Ahead: #1 Wearable brand in the world Beautiful 1.56″ AMOLED Touchscreen: Bright crisp graphics with 40% Larger Display than Mi Band 5. Imperial measurements (feet, miles, fahrenheit) or metric. Two-Week Battery Life: Easily charge with magnetic snap on charger for your on-the-go lifestyle. New SpO2 Sensor + 24Hr Heart Rate Monitoring. Track 30 Different Activities Using Mi Wear App. Autodetects 6 fitness activities. 5ATM Water Resistant: Go swimming, spend the day in the water, or wear in the shower after a workout.