Product nameHaylou GSTDimensions49.9x38.7x11.7mmStrap width22mmWatch weight (with strap)42gDisplay1.69" TFT displayResolution240x280pxBluetooth versionBluetooth V5.1SensorHeart rate sensor, motion sensor, blood oxygen sensor Battery capacity220mAhCompatibilityAndroid 6.0 and above; iOS 11.0 and above. Supported functions will vary with different watches, mobile phones, and countries Battery life Approx. 9 days - 24 hours heart rate monitoring Waterproof gradeIP68Working temperature-0°C~40°CSynchronous data platform Haylou Fun Workout modes Outdoor running, indoor running, fast walking, cycling, climbing, spinning, yoga, free training, rowing, gymnastics, basketball, football