Broader view, clearer detailsThe bigger, clearer, 1.43" AMOLED display offers a more colorful, smoother viewing experience. The always-on display allows you to check the time more conveniently. Important notifications such as incoming calls, reminders, and sports notifications can be displayed with clarity, even in strong light.Exquisite metal bezelLightweight and comfortableThe new stylish and lightweight design to truly style up your fitness. Weighing only 36.3g, Xiaomi Watch S1 Active will assist your workout with no limits.Dual-band multi-system GPSThe built-in dual-band GNSS chip supports five major satellite positioning systems: GPS, BeiDou, GLONASS, Galileo, and QZSS, together with advanced optimization algorithms to achieve faster, more accurate positioning, giving you professional statistics.Specifications:Sensors: Heart rate sensor (with blood oxygen sensor), accelerometer, gyroscope, geomagnetic sensor, atmospheric sensor, ambient light sensorDimensions: 46.5x47.3x11mm (not including the strap and local protrusions)Satellite positioning systems: GPS, GLONASS, GALILEO, BDS, QZSSFrame: Glass fibre-reinforced polyamideBattery capacity 470mAhDisplay: 1.43" AMOLED displayWater resistance rating: 5 ATMResolution: 466x466Operating temperature: -10 C - 45 CAdjustable length: 160-220mmCompatible with: Android 6.0 or iOS 10.0 and aboveWireless connection: White siliconeWi-Fi IEEE 802.11b/g/n 2.4GHz, Bluetooth 5.2Standards implemented: GB/T 30106-2013