Product Parameter: APP: Da Fit Screen size: 1.4 inches Pixel: 172RGB*320 Touch type: full screen touch BT 5.1 Bluetooth Low Energy Chip Gravity sensor: support Battery Type: Polymer Lithium Ion Capaci more→ty: 180mAh Charging method: magnetic line Compatible system: Android5.0 (inclusive) or above, IOS9.0 (inclusive) or above Screen Diagonal: 1.4" Waterproof Rating: IP67 Heart Rate: Yes Pedometer: Yes Calorie Counter: Yes Compatibility: Android 5.0, IOS10 Bluetooth:5.0 Main functions: exercise record (step counting, distance, calorie calculation), exercise mode, message push, information storage, heart rate monitoring, sleep monitoring, blood pressure measurement, blood oxygen saturation measurement,…