AMOLED color display. Active Zone Minutes. 24/7 Heart Rate. Oxygen Saturation (SpO2) Monitoring. Real-Time Pace & Distance. All-Day Activity tracking. 20 Exercise Modes + SmartTrack. Stress Management tools. Sleep Stages & Sleep Score. Receive smartphone notifications. Battery life up to 5 days. Water resistant to 50 M. App compatible with iOS 13.3 or higher and Android OS 8.0 or higher. Small band fits wrists 5.5" to 7.1" in circumference. Large band fits wrists 7.1" to 8.7" in circumference. Includes: Small and Large bands. Charging cable.