Amazfit Band 5 Olive The Amazfit Band 5 identifies sleep stages (deep, light and REM, plus awake periods) and provides suggestions based on analysis of your sleep breathing quality and overall sleep quality, to help you improve your sleep habits. It can even monitor daytime naps over 20 minutes. Depth: 12.4 MM You can talk to Amazon Alexa on your Amazfit Band 5. Ask Alexa questions, get translations, set alarms and timers, create shopping lists Measure your blood oxygen saturation and understand your physical state with OxygenBeats 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 Amazfit Band 5 incorporates a professional health assessment system — PAI (Personal Activity Intelligence) Height: 47.2 MM Width: 18.5 MM