1.43-inch AMOLED low-power full circle screen Easy to replace strap, standard 22mm Massive dial push, custom dial Bluetooth call/Bluetooth music (ultra clear sound quality), weather display Heart rate detection, blood pressure detection, blood oxygen detection, and all-day heart rate detection Time display, step count, calories, distance, heart rate, blood pressure, blood oxygen, sleep time, on/off display, stopwatch, multiple exercise modes Sleep monitoring (sleep time, sleep quality) Call notifications, message reminders, push notifications in multiple languages, alarm reminders, remote photography, and sedentary reminders The bracelet supports multiple languages 530mAh large battery, ultra long standby time, and the screen display is very bright outdoors Synchronize data to APK/APP App/APK download method: Android and Apple app synchronization FitCloudPro Reminder (iOS system in Apple Store, Android phone searching for FitCloudPro APK in App Store to download and install) Scan QR code to download and install FitCloudPro Parameter specifications The system requires Android 4.4 and above, IOS 8.0 or above, supports Bluetooth 5.0 Bluetooth version BLE 5.0 Main control chip Ruiyu 8763EWE-VP Memory Flash 256MB Screen resolution 466 * 466 Heart rate 3918 Horn 1306 Battery capacity 530mA Standby time of about 30 days Working time is around 5-10 days Built in motor, vibration reminder