If you're looking for an ideal solution for your health and fitness management, then look no further than Amazfit Band 5 activity fitness tracker. It provides all-around health management including blood-oxygen-level measurement, 24/7 heart rate monitoring, sleep quality & stress level tracking, breathing exercise, and menstrual cycle tracking. What's more, Amazfit Band 5 incorporates a professional health assessment system — PAI, offering one single score to understand your overall physical health. Focus on your workout and exercise with built-in 11 sports modes. And It works even underwater with 5 ATM water resistance. Featuring a brand-new 1.1” full-touch color AMOLED screen and 45+ watch faces, the Amazfit band 5 fitness watch matches seamlessly your personal style. Stay In-the-know with built-in Amazon Alexa. Boasting a powerful battery to deliver up to 15 days of endurance under a typical usage scenario. Compatible with Android 5.0 or iOS 10.0 and above devices.