Heart Rate Monitoring & Sleep Tracking: Heart rate monitoring helps you understand your heart status during workouts. Our smart watch also tracks your sleep automatically, helping you to measure awake, light, and deep sleep periods. Activity Tracking with 9 Sports Modes: Track your daily activity data like steps, calories, distance and minutes active and generate data charts on your device. You can also use the built-in multi sports modes to see real-time exercise stats. Multifunctional Smart Watch: Sedentary reminders, relaxation training, call/message reminders, reject call functionality, alarms, music control, customized watch dials, stopwatch settings and you can even store up to 10 messages this device has it all, it's also IP68 water resistant. Easy charging & 10+ Days Usage Time: with a 210Mah large battery, just 2 to 3 hours charging enables more than 10 days usage so that you can play more and charge less. Battery life and charge cycles vary with use, settings, and other factors. Compatibility: Compatible with smartphones that use iOS 8.0/Android OS 4.4 or later, and Bluetooth 4.0 or later. Any questions can be answered by our customer care team within 24 hours