Note: People with dark skin will not be able to measure heart rate, blood pressure, and blood oxygen. Other functions are normal APP name :DaFit APP Language: Arabic, Bulgarian, Polish, Bosnian, Danish, GerAdult, Russian, French, Traditional Chinese, Finnish, Korean, Dutch, Simplified Chinese, Czech, Croatian, RoAdultian, Norwegian, Portuguese, Pashto, Japanese, Swedish, Slovak, Thai, Turkish, Ukrainian, Spanish, Greek, Hungarian, Italian, Hindi, Indonesian, English, Vietnamese watch language: Chinese, Traditional Chinese, English, GerAdult, Korean, Spanish, Japanese, French, Russian, Arabic, Ukrainian, Italian, Portuguese Features: 1.1.8 inch IPS HD screen; 2.320mAh battery; 3.IP67 Waterproof; 4.GPS sport Tracker.You can use it in APP; 5.Fitness Tracker; 6.Custom Dials; 7.Smart Watch for IOS Andriod; Call Reminder and Message push,dont miss important call. Music Player FAQ Q1: How long does it take to charge and how long does it stand by? About 2h,5-7 days of use, about 20-30 days of standby. Q2:If this smart watch can take bath pool? It is not recomAdultded to wear a watch for swimming or bathing, because it has just water resistance.Wash your hands, wash clothes, etc., so that you can use it more worry-free (not supported hot water or sauna ) Q3: Will every watch be packaged? Yes, every watch will have a packaging box, try to ensure that the package is damaged. Q4: Is the heart rate, blood pressure or other function accurate? To be honest, its just a sports and health assistant, it could not be considered as medical equipAdultt, we suggest you buy a professional medical device if necessary. Q5: Why does the bluetooth fail to work? The bluetooth service of some phones may occasionally be abbnormal when restarting, and it usually can be solve after restarting. Q6: Support Custom screen as watch faces? Yes. You can DIY a photo as watch face. Notice:Please do not compared to hospital equipAdultt about reading,it is NOT a medical device !Before using, scan the QR code on the Adultual to download the app and connect it to the watch with APP.