Xiaomi is One Step Ahead: #1 Wearable brand in the world Beautiful 1.56" AMOLED Touch Screen: Bright crisp graphics with 50% Larger than Mi Band 5 Two-Week Battery Life: Easily charge with magnetic snap on charger. 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.