Smartwatch-compatible systems Go to the app store to download the app, and the data can be viewed 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, etc. Personalised 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 1.5-2 hours with fast charging. Equipped with a high-capacity 270 mAh battery, it can last 5-7 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*37.8*10.7 mm Packaging box size: 154*85*22 mm Water resistance: IP68 Product weight: 50g Flash size: 128MB Bluetooth version: BLE5.2 Battery capacity: 270mAh Working time: Standby for 25 days, use for approx. 7 days. Charge for two 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 Fitness smartwatch is compatible with square 1.91 full-touch colour display inch smartphones with 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 monitors and detects your blood pressure, blood oxygen, heart rate and sleep quality in real time. 24 sports modes & IP68 waterproof: Supports 24 sports modes such as running, cycling, etc. Waterproof, does not support prolonged immersion in water. Bluetooth 5.2 chip, stable and efficient. 270mAh lithium battery, safe and efficient, can be used for 5-7 days after 2 hours of charging.