C28Pro: [Screen size]: 2.09inch [Resolution]: 240x285 pixels [APP]: Hiwear Plus [Battery]: 180mAh [Language]: The standard version defaults to English with support for 22 languages [Chip]: Hengqida solution, Zhongke fourth-generation chip Weight and dimensions: weight box specifications: [Individual weight]: 86.2g [Gross weight per box]: 9.2kg [Color box size]: 15.7*9*3cm [Packaging Quantity]: 100 pieces/box [Packaging dimensions]: 493335cm C20Pro: [Screen size]: 1.73inch [Resolution]: 128x180 pixels [APP]: HryFine [Battery]: 150mAh [Language]: The standard version is in English by default and includes 21 languages but does not include Chinese [Chip]: Hengqida solution, Zhongke fourth-generation chip Weight and dimensions: weight box specifications: [Individual weight]: 87.6g [Net weight per box]: 9.9kg [Color box size]: 15.7*9*3cm [Packaging Quantity]: 100 pieces/box [Packaging dimensions]: 493335cm C8ProC26Pro: [Screen size]: 1.44inch [Resolution]: 128x180 pixels [APP]: FitPro [Battery]: 150mAh [Language]: Supports 21 languages [Chip]: Jiaqi Solution Weight and dimensions: weight box specifications: [Individual weight]: 83g [Gross weight per box]: 9kg [Color box size]: 15.6*9*3cm [Packaging Quantity]: 100 pieces/box [Packaging dimensions]: 493335cm Function Introduction: Sports step counting, step distance and calorie activity data recording, heart rate, blood pressure, blood oxygen, sleep monitoring, Bluetooth calling, WeChat and QQ message notifications, Bluetooth music, weather forecast, calculator, stopwatch, alarm clock, sedentary reminder, hydration reminder, remote camera control, voice assistant, find phone, racing games, flashlight, bedside lamp mode, time and calendar, multi-language settings. Function introduction: Exercise pedometer, step distance, calorie activity data record, heart rate, blood pressure, blood oxygen and sleep monitoring, Bluetooth calls, WeChat QQ message reminders, Bluetooth music, weather forecast, calculator, stopwatch, alarm clock Clock, sedentary reminder, drinking water reminder, remote photo taking, voice assistant, mobile phone search, racing game, flashlight, bedside lamp mode, time and calendar, multi-language settings