HK20 1.85 inch Color Screen Smart Watch,Support Heart Rate MonitoringBlood Pressure Monitoring About Product 1. Battery capacity: 260mAh 2. Bluetooth version :BLE5.0 3. Charging method:wireless charging 4. Resolution : 240x286 5. Waterproof rating: IP67 6. System: Android system 4.4 version or above,iOS system 9.0 version or above 7. APP:FitCloudPro 8. Watch support languages:Chinese, English, German, Russian, Portuguese, Spanish, French, Japanese, Arabic, Dutch, Italian, Czech, Greek, Hebrew, Indonesian, Korean, Malaysia, Poland, Thai, Vietnam, Finland, Romania, Turkey, Croatia 9. APP support languages:Simplified Chinese, Traditional Chinese, English, Ukrainian, Russian, Croatian, Hungarian, Turkish, Greek, German, Italian, Czech, Slovak, Japanese, French, Polish, Persian, Thai, Swedish, Finnish, Dutch, Portuguese, Spanish, Albanian, Arabic, Korean Function 1. Bluetooth call,heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Voice control,NFC, password unlock, female physiological cycle, custom dial, weather forecast, music control 5. Phone, SMS, wechat, QQ, Facebook, twitter, instagram, Skype, WhatsApp, line, kakao talk, others 6. Search function, alarm setting, water drinking reminder, gesture intelligent control, do not disturb mode, reminder mode,mobile search