Hardware Parameter screen size:1.28 inchesPixels:240RGB*240Touch type:Full screen touchChip maker:Goodixchip:GR5515heart rate:Tianyi Hexin HRS3300Battery type:Lithium polymercapacity:210mAhCharging mode:MagneticFLASH memory:RAM256KB ROM64MbAPP:Da FitWaterproof Level:IP67Charging time:About 2.5HLife time:5-7 days of use, 20 days of standbyConnection parameters:5.1 Bluetooth Low Energy ChipCompatible system:Android4.4 (contain), IOS8.0 contain) aboveAPP software features:Step count, sleep, heart rate, blood pressure, oxygen saturation, exercise data recordDial selection, message push, daily alarm clock, photo control, weather informationFind bracelet, time format, do not disturb mode time, all-day heart rate test, turn the wrist bright screenWatch language:English, Chinese, Japanese, Korean, German, French, Spanish, Arabic, Russian, Traditional, Ukrainian, Italian, PortugueseSupports 28 languages: Danish, Ukrainian, Russian, Bulgarian, Bokmal, Norwegian, Hindi, Indonesian, German, Italian, Czech, Japanese, Pushto, French, Polish, Thai, Swedish, Simplified Chinese, Traditional Chinese, Finnish, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean Basic parameters: Major functionExercise record (step counting, distance, calorie calculation), exercise mode, message push, information storage, heart rate measurement, sleep monitoring, stopwatch, camera control, music control, full font language, 1.28 inch round screen, full screen touch