MT55 1.43 inch AMOLED HD Screen Ultra-thin Smart Call Health Watch, Silicone Strap Functions 1. Support Bluetooth calls, multiple menu styles, support 200 dials, breathing training, custom dials, stopwatch, brightness adjustment, multi-sports mode, sleep monitoring, real heart rate blood oxygen, information push, remote music, remote photography, real-time weather, find mobile phone (connect to mobile phone), Bluetooth music playback, calculator, split screen display, weather, alarm clock, sedentary reminder, sports step counting, calorie consumption, sports mileage record, game, voice assistant 2. APP supports languages: Chinese, English, Russian, Arabic, Vietnamese, Danish, Thai, Polish, Persian, Spanish, Malay, Greek, French, Italian, German, Portuguese, Turkish, Latin, Romanian, Hebrew, Burmese, Ukrainian 3. Watch supports languages: Chinese, English, Russian, Arabic, Vietnamese, Danish, Thai, Polish, Persian, Spanish, Malay, Greek, French, Italian, German, Portuguese, Turkish, Latin, Romanian, Hebrew, Burmese, Ukrainian Parameters 1. Chip: Jerry 7012A6 2. Bluetooth: BT 5.3 3. Resolution: 466 x 466 4. Screen size: 1.43-inch AMOLED high-definition screen 5. Compatible system: Android5.0 or above, iOS9.0 or above 6. Flash memory: 128MB 7. Heart rate: VC30F-S true blood oxygen dynamic heart rate 8. Gravity sensor: Minghao DA267-LGA12 9. Control method: full touch screen + single button 10. Charging method: magnetic charging stand 11. Battery capacity: 3.8V200mAh 12. Charging time: 2-3 hours 13. Battery life: 5-7 days 14. Waterproof level: IP67 15. Appearance material: zinc alloy + IML bottom shell 16. Product size: 45.5 x 45.5 x 6.8mm 17. Wristband size: total length 255mm, width 22mm 18. Wristband material: silicone, leather 19. Product weight: 45g 20. APP: Dafit