Product information: SMART WATCH Color: black, silver gray, green Communication type: no card can be inserted Whether the source of patented goods: No Features: 1.28 inch IPS full circle and full viewing angle Easy to replace strap, standard 22mm Massive dial push, custom dial Bluetooth call/Bluetooth music (ultra-clear sound quality), weather display Heart rate test, blood pressure test, blood oxygen test, all day heart rate test Time display, step count, calories, distance, heart rate, blood pressure, blood oxygen, sleep time, switch display, stopwatch, multi-sports mode Sleep monitoring (sleep time, sleep quality) Call notification, information reminder, multi-language push, alarm clock reminder, remote photo taking, sedentary reminder Women's menstrual cycle reminder The bracelet supports multiple languages 400 mAh large battery, long standby time, the screen display is very bright outdoors Sync data to APK/APP APP/APK download method Android and Apple apps sync Dafit Reminder (Download and install Dafit APK for IOS system in Apple store, Android phone search Dafit APK in App Treasure) Scan the QR code to download and install Dafit Specifications System Requirements Android 4.4 and above, IOS 8.0 and above, support Bluetooth 5.0 Bluetooth version BLE 4.0 Master chip Ruiyu 8762C RAM Flash 32MB Screen resolution 240*240 speaker 0916 battery capacity 400 mAh Standby time About 30 days operating hours 5-10 days or so motor Built-in, vibration reminder Packing list: Sports smart watchx1