Product Parameters: 1. Model: M103 2. Dimensions: 46mm in diameter, 12.8mm in thickness 3. Screen: round screen 4. Screen size: 1.35inch 5. Resolution: 390x390 6. Chip: Realtek 8762DT+AC6959A 7. Heart Sensor: hrs3300 8. G-Sensor: SC7A20 9. BT: 3.0+5.0 10. Battery Capacity: 280mAh 11. Charging Way: charging stand 12. Charging Time: 2h 13. Battery Life: 3-5 days 14. Standby Time: 15-20 days 15. Waterproof: IP67 16. System requirements:Android 4.4+/ IOS 9.0+ APP:Da Fit Features: 1. Keep an eye on your health: Heart rate / blood pressure / blood oxygen monitor, sleep tracker. 2. A good helper for workout: Pedometer, calories burned, sports mode. 3. A good helper for daily life: BT phone call, sync 8 contacts, sync notifications, BT music, raise to wake, brightness adjustment, weather, alarm, stopwatch, camera remote, OTA updates, custom faces, games, etc. Languages: UI languages: English, French, Spanish, Japanese, Russian, Portuguese, Korean, German, Arabic, Ukrainian, Italian, Polish, Czech. App languages: Danish, Ukrainian, Russian, Bulgarian, Bokmal, Norwegian, Hindi, Indonesian, Turkish, Greek, German, Italian, Czech, Slovak, Japanese, Pashto, French, Polish, Thai, Swedish, Simplified Chinese, Traditional Chinese, Romanian, Finnish, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, Malay. Note: 1.The principle of smartwatch measurement is completely different from that of medical equipment. It is only for sports and fitness reference, thank you. 2.After receiving the watch, please use the 5V 1A charging adapter to charge the watch for more than 2 hours. 3.Please scan the QR code in the manual to download the APP before use 4. Please contact us to view more details and actual photos before purchasing. 5. We support wholesale & dropshipping, please contact us directly for more details, thanks. 6.This watch is IP67 waterproof, please do not suggest put in water for long time and do not wear to bath, swim, shower. Package List: smart watch*1 charging cable*1 user manual*1