Key Features: Display: 1.96" Square AMOLED display Resolution: 410 x 502｜332PPI Bluetooth call: supported 5ATM water resistance for wearing in the pool Sensors: Heart rate sensor (with blood oxygen sensor) | Accelerometer | Gyroscope Satellite positioning systems: |GPS |Galileo |Glonass |BeiDou| QZSS Battery: Typical use time: 18 days Capacity: 470mAh 150+ workout modes 200+ watch faces to showcase your individuality Built-in GNSS: supported Speaker: supported Wireless connectivity: Bluetooth® 5.3 Operating System: Xiaomi HyperOS