Designed to make your daily work and life much easier, the Amazfit Band 5 has features that will keep you on track! The Band 5 comes with Amazon Alex built in and ready to use. Features like OxygenBeats allow you to measure your blood oxygen level any time, anywhere. With 24/7 monitoring of your heart rate, Amazfit Band 5 performs real-time heart rate monitoring and high heart rate warning. Check your personal stress level -relaxed, normal, medium or high- anytime you feel pressured or stressed, and get some suggestions to reduce it. A guided breathing exercise is especially developed to help you recover from excessive stress. Amazfit Band 5 incorporates a professional health assessment system, PAI, that creates one single score to understand your overall physical health.