a time full charge gives you 15 days normal use, 30 days working.
this fitness watch app is flagfit 2.0, you can download it in app store or google play store, then connect it with smartphone by bluetooth.
also support automatic sleep monitoring from 6:00pm to second day you get up, it records deep sleep, light sleep, stay up and awake states.
Heart rate & sleep monitoringmeasuring your heart rate on every 1 / 2 / 6 / 12 hour automatically, and you can also set up manually tracking once you set it up in the app.long press again to enter sport mode, it will count 3, 2 ,1.
long press to choose which kind of sport, 2. built-in advanced 3d sensor and pedometer to accurately count your steps, calories burned & distance achieved.