Sleek design with exceptional craftsmanshipExquisite aluminium alloy frame with a stainless steel-like high-gloss texture produced through a PVD process.Interchangeable accessoriesTrendy and fully customisable Xiaomi Watch S4 draws inspiration from traditional watches and offers a variety of iconic, trendy interchangeable bezels crafted from quality materials showcasing distinct, creative styles.High-precision sensing module 24/7 health protection The combination of a high-precision heart rate monitoring module and self-developed heart rate algorithm improves the accuracy of heart rate monitoring on the watch to 98%*. Personal running coach on your wrist, Perfect for your training On-wrist running courses From beginners, fat loss and weight loss, to improving cardiopulmonary function and endurance, there are professional courses and scientific training to help you continue to advance. Running form recognition Automatically identify key running posture metrics like vertical ratio, vertical amplitude, and ground contact time to offer professional tips for better workouts. Professional skiing mode records your distance, time, average speed of each glide and turn, and more in the Mi Fitness app. Fall detection for safety while skiing. If no response is detected within 60 seconds, the system will automatically call your emergency contact*. Seamless interconnectivity Remote photo-taking, find my phone, earphone settings*, and more. It can also control Xiaomi Home devices*, making smart wearables and home life more intelligently interconnected. Convenient NFC payment For contactless and cashless payments, simply tap your Xiaomi Watch S4 against a payment terminal*. Now supporting Mastercard¨ and Visa¨. The 1.43 inch organic Resolution: 466 x 466 pixels，PPI 326 EL (AMOLED) display features a high refresh rate of 60 Hz and crisp image quality. Stylish bezel protects the screen from drops and scratches They are seamlessly integrated to create a luxurious look 【Interchangeable Bezel for Extra Customization Possibilities】The Xiaomi Watch S4 features a textured texture inspired by traditional watches. Combining functionality and sophistication, each design has a special style. When you install the dress-up bezel, it will automatically switch to the dedicated watch face with sound. Enjoy an unprecedented experience provided by delicate mechanisms Hundreds of Different Watch Faces: We have prepared a variety of watch face designs that combine traditional elements as a watch with the latest trends. From elegant and dynamic, to delicate and simple styles, find one of your favorites Sensors Heart rate sensor (with blood oxygen sensor) | Accelerometer | Gyroscope | Ambient light sensor | Electronic compass | Barometer sensor | Hall sensor (Upgraded 150+ Types of Workout/Sports Modes) Compatible with over 150 different professional sports modes such as running, walking, and cycling. Xiaomi Watch S3 is also compatible with winter sports such as skiing and snowboarding. Advanced dual sensors enhance motion detection for more accurate motion detection.