Aquarius AQ112 Fitness Tracker With Heart Rate Monitor. Tracks your steps, calories burned, miles covered and active minutes in the daytime. Connected GPS use your smartphone GPS to see real-time pace and distance. With large screen, which helps you read data easily and clearly. The screen brightness can be adjusted according to your requirements, clear viewing during the day and not dazzling at night. Made of skin friendly plastic and rubber material. Continuous, automatic heart rate tracking , it can help you better understand your health and fitness. Including messages of facebook, line, massage, what app, twitter etc. Automatically tracks your sleep duration and sleep stages. Anti-lost functions, alarm clock, stopwatch, etc. With large power capacity and long standby, which can work up to 15 days. Compatible with IOS 9. 0 and above & Android 4. 4 and above smartphones (not for SAMSUNG J3, HUAWEI P8, iPad, tablet or PC), please install the app in your phone and pair the device from it.