LEMFO HK52 1.43 inch BT5.3 IP68 Sport Smart Watch, Support Bluetooth Call Message Notification Heart Rate Blood Pressure Health Monitor 1. Wristband Size: 49x49x11mm 2. Weight: 30.8g 3. Chip: 7012A6 4. APP: Da-Fit 5. Compatible with smartphone systems: Android 4.4 or IOS 10.0 or above systems. 6. Screen: 1.43-inch AMOLED Pixels: 466x466 7. Bluetooth: 5.3 8. Supports NFCG-Sensor 9. Battery: 300mAh 10. Charging Method: Magnetic charging 11. Functions: Bluetooth calling, voice control, always-on display, NFC, calculator, power-saving mode, world clock, customizable watch faces, weather forecast, music control, pedometer, heart rate, sleep monitoring, sedentary reminder, distance, blood oxygen, blood pressure, search, calories, message notifications, female physiological cycle, phone, SMS, WeChat, QQ, Facebook, Twitter, Instagram, Skype, WhatsApp, Line, Kakao Talk, others 12. APP Languages: Supported languages: Danish, Ukrainian, Russian, Bulgarian, Hungarian, Norwegian Bokmål, Norwegian, Hindi, Indonesian, Turkish, Hebrew, Greek, German, Italian, Czech, Slovak, Slovenian, Japanese, Pashto, French, Polish, Persian, Thai, Swedish, Simplified Chinese, Traditional Chinese, Romanian, Finnish, English, Dutch, Portuguese, Mongolian, Spanish, Vietnamese, Arabic, Korean, Malay 13. Watch Languages: English, Chinese, Japanese, Korean, German, French, Spanish, Arabic, Russian, Traditional Chinese, Ukrainian, Italian, Portuguese, Dutch, Polish, Hungarian, Czech, Romanian, Indonesian, Thai, Turkish, Vietnamese, Hindi 14. Waterproof Rating: IP68 15. Charging Time: About 2 hours 16. Battery Life: Usage 5-7 days, standby 30 days 17. Flash Memory: RAM: 640KB ROM: 2MB Flash: 128M