Smartwatch-compatible systems Go to the app store to download the app, and the data can be displayed via the app. The sports watch is suitable for smartphones with Android 5.0 and higher and iOS 9.0 and higher. Smartphones with a lower version than this requirement cannot be used. Health smartwatch The high-performance motion sensor can monitor your dynamic heart rate in real time. The monitor allows you to monitor your blood oxygen saturation and blood pressure for health and fitness applications (not for medical purposes). You can read the data on the fitness watch or the app to better understand your health. Multifunctional and practical smartwatch This smartwatch includes more practical features: fitness tracker (step counter, calories, activity distance), multiple sports modes, IP68 waterproof, sleep monitoring, caller reminder, SMS and SNS messages (WhatsApp, Facebook, Twitter, Instagram, etc.), music control, camera control, brightness settings, weather forecast, sedentary reminder, health reminder, alarm clock, stopwatch, and more. Personalized watch faces & high quality standards Fitness watch with multiple watch faces to choose from and can even be set as a watch face with a custom photo. The corresponding watch face can be switched according to different scenes. Fast charging The smartwatch can be fully charged in just 1.52 hours with fast charging. Equipped with a high-capacity 270 mAh battery, it can last 57 days with normal use and 25 days in standby mode. Product specifications Screen size: 1.91 inch square screen Screen type: TFT Base material: ABS+PC Middle frame material: zinc alloy, vacuum coated Surface material: glass Strap material: silicone Strap size: 22 cm Product size: 40.8 x 37.8 x 10.7 mm Packaging box size: 154 x 85 x 22 mm Water resistance: IP68 Product weight: 50g Flash size: 128MB Bluetooth version: BLE 5.2 Battery capacity: 270 mAh Working time: Standby for 25 days, use for approximately 7 days. Charge for 2 hours Speaker: 1012 high fidelity speaker Charging method: Magnetic wire charging Adaptation system: Android 5.0 or iOS 9.0 or higher, supports Bluetooth 4.0 The package includes: 1 smart watch 1 packaging box Fitness smartwatch compatible with 1.91-inch full-touch color display. Compatible with smartphones running iOS 9.0 and Android 5.0 or higher. When you receive calls, SMS messages or notifications, the smartwatch vibrates to alert you. Built-in motion sensor and high-performance monitoring for real-time tracking of heart rate, blood oxygen, blood pressure, and sleep quality. 24 sports modes & IP68 waterproof: Supports 24 sports modes such as running, cycling, etc. Waterproof, not suitable for prolonged immersion in water. Bluetooth 5.2 chip for stable and efficient connection. 270 mAh lithium battery, safe and efficient, up to 57 days of usage after 2 hours of charging.