5atm & ip69k waterproof, and obtained ip69k certification 380mahlarge battery, standby time over 50 days, daily use time over 15 daysThe latest heart rate sensor hrs3690, test accuracy heart rate is comparable to Apple and Huawei.Newly designed dynamic interface, support split-screen, 1.71 inches clear display, 280 x 320 resolution, give you a better visual experience.Smart notifications for incoming calls, text messages from apps (wechat, qq, weibo, facebook, twitter, whatsapp, line, kakaotalk, instagram, skype, etc). Sleep monitoring, pedometer, sedentary reminder, alarm clock, time, music/music control, 24-hour heart rate monitoring, blood pressure monitor, blood oxygen monitor. Brings your life more convenience.Bluetooth Version: Bluetooth 5.0Chip: realtek8762dkMemory: ram 64kb + rom 128mWaterproof: 5atm & IP68 waterproofDisplay: 1. 71 inch TFT screen, resolution 280*320Battery: 380mAh polymer batteryConnection phone app name: from settingSupport connection mobile phone compatible version: iOS 9.0 and above, Android 6.0 and aboveBelt Size Width: 20mm (replacement support belt)Watch menu language:English (default), Simplified Chinese, Japanese, Korean, German, French, Spanish, Arabic, Traditional Chinese, Russian, Italian, Portuguese, Ukrainian, Turkish, Romanian 15 countries in totalFrom the app language setting:English, Simplified Chinese, Japanese, Korean, German, French, Spanish, Arabic, Russian, Traditional Chinese, Ukrainian, Italian, Portuguese, Dutch, Polish, Swedish, Finnish, Danish, Norwegian, Hungarian, Czech, Bulgarian, Romanian, Slovak, Latvian, Indonesian, Thai, Turkish, Vietnamese, Hindi, Pashto, Lithuanian, Estonian, Slovenian, Croatian, Greek, Filipino, Hebrew, Malay, Serbian, PersianPackage includes:1 x Watch + manual1 x Charging cable1 x Manual