DT NO.I 7 1.9 inch TFT Screen Smart Watch 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. 06. Waterproof lev: IP 687. Product technology: zinc alloy + IML 8. Screen size: 1.9-inch TFT high-definition square screen 9. Screen resolution: 390* 43510. Screen material: gl (OGS) 11. Wristband material: silicone 12. Battery mod: 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: wiress 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, pword protection, calculator, split screen display, quick widget, weather, female istant, mager, GPS track, voice istant, alarm clock, flashlight, power saving mode, Smart and watch mode section, etc. 21. Overall length of wristband: 270mm 22. Head size: 45x38x10.8mm 23. Strap size: width 21mm 24. Body net weight: 35.5 grams