Operating mode one-touch.Open long press function key.1. Open the manual;2. There is a QR code on the manual;3. Scan QR code download APP;4. Open the Bluetooth connection clock.All-day activity tracking: steps, calories burned, mileage and Heart rate, blood pressure, sleep.Smart reminder: call to reminder, SMS push, Sedentary reminder.More features: mobile search, remote camera shooting, stopwatch.Bluetooth 4.0, compatible with Android 4.1 and above, iOS 8.0 and above.