DT NO.I 7 1.9 inch TFT Screen Smart Watch, Support Bluetooth CallMenstrual Cycle Reminder 1. Chip: Realtek RTL8762DK 2. andiord system: support Android 4.4 and above 3. ios system: IOS 10.0 or later 4. Heart rate sensor: Zhanheng BD1662_I2C 5. Bluetooth: dual Bluetooth 5.0 6. Waterproof level: IP68 7. Product technology: zinc alloy + IML 8. Screen size: 1.9-inch TFT high-definition square screen 9. Screen resolution: 390*435 10. Screen material: glass (OGS) 11. Wristband material: silicone 12. Battery model: 551830 polymer 13. Battery voltage: 3.7V 14. Battery capacity: 280mAh 15. Battery life: 5-6 days for normal connection use, 25-35 days for standby. (Connection use depends on personal usage) 16. Charging method: wireless charging 17. Charging time: about 5 hours 18. App supports languages: Chinese, Traditional Chinese, English, Korean, German, Spanish, Japanese, French, Italian, Russian, Portuguese, Arabic, Ukrainian, Thai 19. Languages supported on the device side: English, Chinese, Traditional Chinese, Danish, Greek, Latin, Romanian, Turkish, Hebrew, Czech, Polish, Spanish, German, Russian, Portuguese, French, Japanese, Italian, Vietnamese, Korean, Arabic, Persian 20. Function: Bluetooth calling, 11 sets of menu styles, support for more than 500 dials, breathing training, custom dials, stopwatch, brightness adjustment, multi-sport mode, real sleep, real heart rate, information push, remote music, remote photo, real-time Weather, find mobile phone (connect to mobile phone), bluetooth music playback, password protection, calculator, split screen display, quick widget, weather, female assistant, massager, GPS track, voice assistant, alarm clock, flashlight, power saving mode, Smart and watch mode selection, etc. 21. Overall length of wristband: 270mm 22. Head size: 45x38x10.8mm 23. Strap size: width 21mm 24. Body net weight: 35.5 grams