Features: Metal body in an arc shining on your wrist 1.28inch TFT HD screen delivers real and vivid picture. Comfortable soft nano band for a long wear 12 sports modes, just do what you want to do with Haylou Solar Sophisticated sports sensor precisely records and tracks your workout. Built-in sensor accesses your sleeping data through body physical frequency and "Haylou Fit" APP All day constant heart rate monitoring prevents heart diseases and makes you change your workout plan. IP68 waterproof, no worries sweat or rain,just embrace the ideal sports life Considerate notice: Not miss the incoming call and message 30 days of standby or 15 full days of heart monitoring. More features supported such as timer stopwatch, music control, find phone, weather forecast.