The Amazfit Band 5 is a smart fitness tracker with Amazon Alexa built-in, 15-day battery life, OxygenBeatsTM monitor, 24/7 heart rate, sleep tracker, smart fitness partner, and women’s health tracking. It has 11 built-in sports modes, a water-resistance grade of 5 ATM, and a female period tracking system. It is compatible with Android 5.0 or iOS 10.0 and above.