Feature:1. Heart rate monitoring: Using an optical heart rate sensor, through visible light band measurement technology, through precise calculation, wear a hand to obtain accurate heart rate and blood pressure data. Measurement results can be measured at any time without connecting to the APP. 2. Monitor your sleep time and sleep quality: record depth and deep sleep data to help you quickly find a good sleep. 3. Sedentary reminder: If you forget the time with all your heart, the bracelet will remind you to get up, walk, and wake up in better condition. 4. Equipped with motion sensors: intelligently calculate...